Proteins can be visualized in many ways, each of which highlights a specific aspect of the protein. drag the terms on the left to the appropriate blanks on the right to complete the sentences. helpreset
Answers
For the given sentences, the appropriate terms to be included are as follows :
Space-filling modelSimplified modelRibbon modelSimple ShapeWireframe modelThe 3D representation of a protein is represented by a space filling model, in which the atoms are shown as spheres.
The ribbon model, which is utilized for 3D presentation and uses distinct colour codes for different protein components, aids in understanding the fundamental components of protein structure.
A 3D image created using computer graphics is a wireframe model. When we simply want to investigate the functions of a protein and not its structure, a basic shape diagram is sufficient.
When examining a protein's structure and functions, a simplified diagram is employed.
Various models are suited in various setting and therefore, the terms that best fit in the statement are space-filling model, simplified model, ribbon model, simple shape model, wireframe model respectively.
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Related Questions
What are the two major factors determining the distribution of terrestrial biomes?temperature and light temperature and rainfall light and rainfall plants and animals temperature and plants
Answers
Answer:
Temperature and light
Explanation:
This two factors are determinants in terrestrial biomes, because the temperature is closely related to rainfall, to the formation of glaciers, to the migration of species. And the light is related from the use of these reay by the plant, through the greenhouse effect. This two make the biodiversity to be what it are
A geologist discovers that the number of fossils of a single species decreases significantly in higher rock layers compared to deeper rock layers. Which conclusion can best be drawn from this evidence?
Answers
Answer:
The species became less abundant
Explanation:
If the species decreases it doesn't necessarily means it has become extinct.
Answer:
This means that the number of individuals of this species has decreased over time.
Explanation:
When a rock is formed in one place, it goes through a process called weathering, which causes this rock to create layers over time. The deeper the layer, the older it is, on the other hand, the more superficial layers are younger. This is very important when cinetistas want to know how the population of a given species has increased or decreased over the years.
This occurs by visualizing the amount of fossils in each layer of the rock. If scientists can see that the number of fossils of a single species decreases significantly in the higher rock layers compared to the deeper layers, they can conclude that the number of members of that species has decreased over time.
Which of the following occurs in situations where more than one hormone produces the same effects at the target cell and their combined effects are amplified?
A. synergismB. antagonismC. summationD. permissiveness
Answers
Answer:
The correct answer will be option-A.
Explanation:
Hormones act on the target cells of the body in two ways: antagonism and synergism.
The synergism is the condition when two or more hormones act on the same target cells to produce more strong and amplifies results than they achieve individually. The most common example of synergism in the body is the effect of the follicle-stimulating hormones (FSH) and testosterone on sperm production.
Thus, option-A is the correct answer.
As Rick was filling out the loan application, he couldn't remember his previous address even though he had lived there for five years. Rick's memory of his current address was interfering with his memory of his old address, which is an example of:
Answers
Answer:
Retro Active Interference
Explanation:
This confusion of Rick's memory for his address for the previous one is attributed to Retro active interference.
The phenomena where recently learned memory of a person meddles with and blocks the review of previously learned data or memory is referred to as Retro active Interference.
This happens when the underlying demonstration of reviewing explicit data meddles with the recovery of the first data.
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PICTURE IS THE QUESTIONNN? THE PICTURE/SCREENSHOT is the questions and Question 1 has a picture to the question.
here are the answer choices if you can see them.
Question 1: A scientist observed that during the course of a chemical reaction in a tissue culture of animal muscle cells, the number of ATP molecules produced was greatly reduced. What did the scientist most likely hypothesize from the observation?
a
oxygen availability became limited
b
oxygen availability increased
c
carbon dioxide availability increased
d
carbon dioxide availability became limited
Question 2: Cells store energy when?
a
the third phosphate group breaks off from an ATP molecule.
b
a third phosphate group is bonded to an ADP molecule
c
they break down sucrose to glucose and fructose.
d
ions are released into the bloodstream.
Answers
Q1= the answer I think should be A
Q2= the correct answer B
Answer:
The correct answer will be option-
1. Option-A
2.Option-B
Explanation:
Case I
The production of ATP molecules in the animal cell takes place through a complex process called cellular respiration. The cellular respiration leads to the breakdown of the glucose molecule in the presence of oxygen which is utilized as an electron acceptor in the electron transport chain.
Since the ATP level decreased in the tissues indicated that the tissues are not getting enough oxygen molecule. Thus, option-A is the correct answer.
Case II
The cells store the energy molecule in the form of the ATP molecule which is formed by Phosphorylation or adding the phosphate group to the ADP molecule in the presence of energy provided by the movement of H⁺ ions.
Thus, Option-B is the correct answer.
After the drought of 1977, researchers on the island of Daphne Major hypothesized that medium ground finches that had large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. If this hypothesis is correct, what would you expect to observe if a population of these medium ground finches colonizes a nearby island where T. cistoides is the most abundant food for the next 1000 years?
Answers
Answer:
If a population of medium ground finches with large, deep beaks colonizes a nearby island where Tribulus cistoides is the most abundant food for the next 1000 years, it is expected that this finches population will dominate de island, displacing the smaller beaked birds.
Explanation:
Since large seeds will be available for the next 1000 years as the most abundant food, only birds with large beaks will be able to eat them. Smaller beaked birds won´t be able to feed on them, and eventually, they will starve because they won´t have any food. In this way, the finch population will rapidly change on the new island in favor of the medium ground finches with large, deep beaks.
What heart problem would be experienced by an individual whose ECG is seen at C?
a. ECG tracings showing normal and various abnormal rhythms.
b. The atria are not pumping blood.
c. The ventricles are not reaching systole in every cardiac cycle.
d. The heart is not pumping any blood at all.
e. The heart would pump with too much pressure (hypertension).
Answers
Answer:
The ventricles are not reaching systole in every cardiac cycle.
Explanation:
Pesticide use ________.
a) may be a necessary part of modern technological agriculture
b) can be eliminated by changing the season when crops are planted
c) will be eliminated as pests decrease as a consequence of years of pesticide use
d) poses no environmental threat in this country
e) will not be a problem as we learn to genetically modify predators
Answers
Answer: Option A.
Explanation:
Pesticide are defined as the substances which are used to control pests, and weeds in agricultural practices. Herbicide, insecticides, nematicide and fungicide are the examples of pesticides.
Now a days use of pesticide has become a necessary part of modern technological agriculture. Agricultural technology has evolved a lot from past and several benefits of pesticides are found that affect production and quality of crops. Other advantages of pesticides that makes its use necessary includes improve economic status of countries due to increases in yield using pesticide that reduces pests effect on yield; pesticides undergo photochemical transformation and produces metabolites which are non-toxic to human health and the environment; and Insecticides are used to control the insects which caused diseases like malaria.
Hence, the correct option is A.
Final answer:
Pesticide use a) may be a necessary part of modern technological agriculture.
Explanation:
The correct answer to the question about pesticide use is that it a) may be a necessary part of modern technological agriculture. Pesticides play a crucial role in controlling crop pests, which are mostly insects, and can significantly increase agricultural productivity when initially applied. However, over time, pesticides become less effective as pest populations evolve resistance. There's also the consideration of their impact on non-target species, including beneficial insects like honeybees, and environmental pollution affecting other ecosystems. Despite these concerns, the complexities of agriculture make the use of pesticides a continuing reality, although practices such as increasing landscape complexity to support natural pest enemies and reducing pesticide use can help mitigate some of the negative effects.
You do a gram stain of an unknown bacterium and the teacher guarantees you that is it a member of family Enterobacteriaceae. However, your cells come out purple. What other clue might indicate that you do have a member of that family of bacteria?
a. tiny cocci bacilli in chains
b. tiny bacilli
c. rod-shaped cells with endospores
d. curved rods.
Answers
Answer:
The correct answer is c. rod-shaped cells with endospores
Explanation:
Most members of family Enterobacteriaceae can appear pink after gram staining due to porous membrane like Zymophilus, Pectinatus etc. Most of them form endospores which is a very tough outer covering formed by cells to resist the adverse condition. Many members of these family resides in intestine of animals and helps in food digestion.
These bacteria comes under phylum Firmicutes and mostly are rod shaped(bacillus). So when most of cells comes out purple the rod shaped cells with endospores indicates that gram stain contains the member of family Enterobacteriaceae.
The correct option is b. tiny bacilli clue might indicate that you do have a member of that family of bacteria.
When performing a Gram stain, members of the family Enterobacteriaceae are typically Gram-negative bacteria, which means they should appear pink or red under the microscope after the staining process. However, if the cells come out purple, it suggests that they have retained the crystal violet dye, which is characteristic of Gram-positive bacteria. This could be due to improper staining technique or the presence of a Gram-variable organism.
Despite the unexpected Gram stain result, the teacher's guarantee that the bacterium is a member of the family Enterobacteriaceae can be supported by other characteristics:
a. Tiny cocci bacilli in chains: This description does not match the typical morphology of Enterobacteriaceae, which are usually rod-shaped.
b. Tiny bacilli: This option is consistent with the typical morphology of Enterobacteriaceae, which are small rod-shaped bacteria.
c. Rod-shaped cells with endospores: While some rod-shaped bacteria form endospores, members of the family Enterobacteriaceae do not typically produce endospores.
d. Curved rods: This morphology is more characteristic of other bacterial families, such as the Vibrionaceae family, not Enterobacteriaceae.
Therefore, the presence of tiny bacilli (option b) would be a clue indicating that the bacterium is indeed a member of the family Enterobacteriaceae, despite the Gram stain result. It is important to consider other morphological and biochemical characteristics when identifying bacteria, especially when there is a discrepancy in staining results.
Cells contains parts known as organelles. These parts are specialized. What does that mean
Answers
Answer:
The answer below
Explanation:
What means that organelles are specialized?
Cells contains several kinds of organelles which help it to accomplish all the functions the cell needs. The cell is similar to us, we have different organs to do all our functions, the organelles are specialized in different activities to do all the functions the cells needs to be healthy. For example it has a membrane to protect and isolate from the environment, it has several mitochondria to generate energy or it has a nucleus to control all the activities. If the organelles weren't specialized, the cell couldn't accomplish all its functions.
Specialization refers to the process by which a structure becomes differentiated for a particular function. When a female ovum is fertilised by sperm, a zygote is formed which grows by mitosis. As it grows into am embryo then foetus, these cells undergo specialization as they form different tissues and organs which all play different roles to ensure the proper functioning of the body. Similarly, as organs and tissues cells undergo further specialization, in terms of organelles. Each cell contains organelles which serve different purposes, the nucleus controls cellular activity, mitochondria provides energy in the form of ATP, cytoplasm which provides the environment for metabolic reactions and ribosomes for protein synthesis ( to name a few). Each organelle uniquely specialized for its intended purpose and all reliant on each other.
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You hang a microscope slide from a submerged, L-shaped PVC pipe in lake water that is 2 feet deep. The slide hangs 6 inches below the surface of the water and remains there for eight weeks. When you remove it and bring it to your lab for observation, you see that algae, bacteria, and even some fungi have colonized the slide. You determine that you are looking at a(n)
Answers
Answer:
The correct answer is a biofilm.
Explanation:
A collection of one or more kinds of microbes, which can grow on various distinct surfaces is considered as a biofilm. The microbes, which produce biofilms comprise fungi, bacteria, and protists. One prime illustration of a biofilm is a dental plaque, that is, a slimy accumulation of bacteria, which develops on the surface of teeth.
Final answer:
The colonization of algae, bacteria, and fungi on the microscope slide that was submerged in lake water for eight weeks indicates the observation of a biofilm.
Explanation:
The colonization of algae, bacteria, and fungi on the microscope slide that was submerged 6 inches below the surface of the water in a lake for eight weeks indicates the observation of a biofilm. A biofilm forms when planktonic bacteria adhere to a surface and produce slime, resulting in the formation of a colony. In this case, the water's dissolved organic carbon (DOC) and larger particles contributed to the growth of biofilm and prevented algal blooms.
The names of muscles often indicate the action of the muscle. What does the term levator mean?
A. The muscle flexes and rotates a region.
B. The muscle elevates and/or adducts a region.
C. The muscle functions as a synergist.
D. The muscle is a fixator and stabilizes a bone or joint.
Answers
Answer:
The right answer is B. The muscle elevates and/or adducts a region.
Explanation:
Levator muscles are the muscles use to raise any region of the body. Like levator anguli oris which elevates the corner of the mouth, levator ani which is made up of many muscle sheets of iliococcygeus, puboretalis, and pubococcygeus muscles and holds pelvic viscera in their place.
Levators costarum during breathing helps in raising the ribs, levator palpebrae superioris have function in raising the eyelids and there are so many levator muscles are present in different places in the body which helps to elevate and/or adducts a region.
Therefore, the right answer is B. The muscle elevates and/or adducts a region.
Homeostasis is the maintenance of internal consistency. It’s a common principal in all living things and extends to pH. In a living system, what helps the organism maintain its pH homeostasis?
Answers
Answer:
Buffer systems
Explanation:
Living organisms maintain constant pH of both extracellular and intracellular fluids. The human body also maintains the pH of blood within the narrow range of 7.35 to 7.45. This is achieved with the help of buffer systems. Buffers are the chemicals that convert the strong acids or bases into their weak counterparts by removal or addition of protons.
For example, carbonic acid–bicarbonate buffer system of the human body wherein the bicarbonate ions serve as weak bases while the carbonic acid serves as a weak acid.
Under the conditions of higher H+ concentrations, the bicarbonate ion of the buffer system serves as a weak base and accepts the excess of the H+ to restore the normal range.
A truck carrying petroleum collided with a tree and has been leaking gas since the collision. Ecologists suggest the use of microorganisms to prevent soil pollution due to the leakage. Which method are the ecologists suggesting should be used?
Answers
Answer:
The method ecologists are suggesting is bio-remediation.
Explanation:
The treatment of contaminated or polluted areas such as any surface material, water or soil by using microorganisms is termed as bio-remediation. The microorganisms tend to degrade the pollutants. Also, the method of bio remediation is cheaper then any other alternative methods. Another subtle advantage of using the method of bio remediation over other methods is that the microorganisms can be genetically engineered to degrade certain type of pollutant.
what is fetch, definition???
Answers
Answer:
achieve when sold
Explanation:
Ideally, the nasal septum will devide the nasal cavity equally, but it is common for this partition to be slightly off center. A deviated septum, however, is a condition in which the nasal septum is shifted significantly away from the midline. Explain how this abnormality may cause difficulty in breathing.
Answers
Answer:
A deviated septum occurs when bone and the cartilage that divides the nose septum become off-center which results in two unequal nasal septum. This makes one nasal chamber smaller and another larger.
This abnormality causes difficulty in breathing because of the congestion and blockage of the smaller nasal cavity. Due to this congestion airflow in the lungs is hindered which results in lack of oxygen and difficulty in breathing.
Apart from difficulty in breathing it can leads to nose bleeding, loud snoring during sleep, facial pain, headache, and in respiratory infections breathing become more difficult.
A deviated septum can develop due to some trauma or during surgery but some people are born with this abnormality.
The nasal septum is a structure that separates the nasal cavity into two halves. A deviated septum, a condition where the nasal septum deviates significantly from the midline, can cause difficulty in breathing by impeding normal airflow, particularly during exertion.
Explanation:The nasal septum is a flat, midline structure that separates the nasal cavity into two halves. It is formed by the perpendicular plate of the ethmoid bone, vomer bone, and septal cartilage. The septum contributes to the moistening and warming of air as it enters the nose, due to the surfaces of the conchae and the nasal mucosa.
When the nasal septum is significantly deviated from the midline in a condition known as a deviated septum, it can impede normal airflow, resulting in difficulty breathing. This happens because the deviation can block one side of the nose, reducing airflow and making it more difficult for air to pass freely through the nasal passages. This is especially noticeable during exertion when a higher volume of air is required.
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Question 7
A reaction between an acid and a base that produces a salt and water is a(n)_____ reaction.
A)neutralization
B)synthesis
C)decomposition
D)endpoint
Answers
Answer:
Neutralization
Explanation:
Neutralization, there is nothing much to add. Neutralization is the reaction of an acid and a base. A typical acid is HA and a typical base BOH the reaction is:
HA + BOH -> H2O + BA
H2O is water
BA is the salt
Answer:
A reaction between an acid and a base that produces a salt and water is a neutralization reaction. Hence the answer is option A.
Explanation:
A neutralization reaction is defined as when a chemical utilize the other chemical during the course of reaction. In this case the acid utilizes the base and the base neutralizes the acid. During the course of reaction the salt is formed and the salt is deposited in the base of the container.
Acid can turn blue litmus into red whereas a base can turn red litmus paper into blue. According to the pH value of acid is defined as whose value is is less than 7 and a base is defined as whose value is more than 7 up to 14.
The mucosa of the appendix contains masses of lymphoid tissue (MALT) and therefore leukocytes capable of attacking bacteria are present in the appendix. During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because ______.
Answers
Answer: There is an inadequate blood supply to the appendix wall
Explanation: The appendix is a tube-shaped sac that's attached to the large intestine. It exists in humans and a small number of other mammals, including the koala and apes. In medical terms, it’s referred to as 'vermiform appendix' for its thin, worm-like shape.
According to researchers, the human digestive system is full of bacteria necessary to digest food. [1] When attack from diseases, sometimes these important kinds of bacteria are purged or killed off. In such situations, the appendix can act as a reserve for good bacteria. After the immune system beats off the disease, the bacteria emerge and re-colonize the gut.
During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because of the inadequate blood supply to the appendix wall. Therefore leukocytes are not able to migrate to the site of infection to attack the bacteria.
Bacteria trapped in the lumen of the appendix during appendicitis aren't effectively attacked because inflammation and swelling from the resulting inflammatory response create a physical obstacle that interferes with the immune response. This is despite the appendix housing the mucosa-associated lymphoid tissue (MALT), a critical component of the immune system that typically aids in fighting off bacteria.
Explanation:During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because the resultant inflammation and swelling can create a physical barrier that hinders the circulation of leukocytes and the conduction of the immune response. The mucosa-associated lymphoid tissue (MALT) in the appendix forms an integral part of the immune system, housing leukocytes that attack bacteria. Specialized endothelial cells, known as M (or microfold) cells in MALT, typically transport materials from the intestinal lumen to neighboring follicles to instigate immune responses against potential pathogens.
However, in the case of appendicitis, a blockage in the lumen can trigger these cells to incite an inflammatory response instead. That can lead to the appendix swelling, essentially creating a physical barrier that prevents leukocytes from effectively reaching and attacking the trapped bacteria.
Furthermore, this situation can be exacerbated by the presence of copious blood and lymphatic vessels in the lamina propria (the tissue layer beneath the MALT). When these vessels react to the inflammation by dilating and becoming permeable, tissue edema can ensue, further compromising the immune response.
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How many ATP are generated in the electron transport chain?
o2
O4
32
36
Answers
Answer:
32
Explanation:
A guest called an operation and told the manager about getting sick after eating there.The guest complained of vomiting and diarrhea a few hours after eating the raw oysters.What pathogen probably caused the illness?
a) Norovirus
b) Shigella spp.
c) Salmonella Typhi
d) Enterohemorrhagic and shiga toxin-producing E.coli
Answers
Answer:
a) Norovirus
Explanation:
Norovirus also known as winter vomiting bug is a very contagious virus. It causes vomiting, diarrhea and stomach pain. It can spread from eating contaminated food or by person to person. Oysters and other shell fish are very common agents of norovirus outbreaks. When they are exposed to untreated human sewage they come in contact with the virus. They filter sea water via their bodies to obtain food but norovirus is able to cross their bodies and accumulates inside them. Oysters are typically at more risk of transmitting the disease because they are eaten raw. To reduce the risk of norovirus shellfish should be cooked at a temperature of 145 degrees Fahrenheit.
Although he gave minilessons on using text factors, a teacher found that his students were still not internalizing and applying this information. Of the following, the best way to help students internalize the information would be for the teacher to:A) place the students in literature circlesB) demonstrate with a think-aloudC) require students to read nonfiction booksD) provide more time for sustained silent reading
Answers
Answer:
The correct answer is option B) "demonstrate with a think-aloud".
Explanation:
Think-aloud literally means to say one thoughts, expecting to other people would hear them. The strategy of describing the thoughts is very helpful for a teacher to achieve that his students internalize the information that is being given. If the teacher uses this approach, the student could see the teacher's perspective and would know what the teacher is thinking when he is using text factors. In consequence, the next time the student tries to use text factors she or he would know for certain what is the teacher approach.
QUESTION 20
The strength of a base that only partly ionizes in solution would be described as _____.
A)dilute
B)concentrated
C)weak
D)strong
Answers
A base that partly ionizes in a solution is described as a weak base (option C), distinct from a strong base that ionizes almost completely.
The strength of a base that only partly ionizes in solution would be described as weak (option C). This is because a weak base is one that does not completely dissociate into its ions in solution. The key distinction between a weak base and a strong base is the degree of ionization. A strong base dissociates almost completely when dissolved in water, while a weak base only does so partially. Whether a solution is dilute or concentrated refers to the amount of solute in the solvent, and not the intrinsic strength of the acid or base.
What refers to the role of a species in it's ecosystem and often relates to what it eats or what consumes it?
Answers
Answer:
ANSWER : NICHE
Explanation:
The particular role of a species or organism in its comprising ecosystem is termed as niche. Niche refers to every way that a specie interacts with its environment included both the biotic components as well as the abiotic components. Niche describes how well an organism is adapted for a particular environment. It tells us how well a species is for competing for food and other resources in that environment and how it is better for that environment.
Stellar evolution is the life cycle of a star. A cycle suggests that upon death of a star, another star is born. How is this possible? A.Stars never really die. B.The death is a black dwarf star. This type of death triggers the birth of a new star. C.The death is a red giant. This type of death emits red energy that forms a new star. D.The death is a supernova. This type of death can produce nebular clouds and trigger the birth of a new star.
Answers
Answer:
star never really die
Explanation:
Because stars dont die
Answer:
Option- B
The death is a black dwarf star. This type of death triggers the birth of a new star.Stars are comprised of a number of mixture of gases as we know that due to the losses that happens inside the celestial objects the energy inside which they posses runs out of stock or it decrease and it then form the red dwarf which is the magnanimous form of mixture of gases. On further contraction of this mass which is really due to the extensive amount of gravity been placed inside them, there is a formation of nebula or we can say more different celestial entity.And at the end if the star is not big enough or too large as compared to our sun, then it would turn into a black dwarf, or in other cases if the star which forms the nebula is too large then it will be then transformed into a black hole depending upon the size of the star.
In a playoff game between the State City Champions and the Anytown Victors, Sara initially bet against the State City Champions, who eventually won. After the game, she claimed she knew the Champions would be the winners. This is an example of a flaw in thinking called the _____ bias.
Answers
Answer:
This flaw of thinking is called the HINDSIGHT bias.
Explanation:
"We don't really know the result, but we think as though we do."
The Hindsight bias, creeping determinism, or knew-it-all-along phenomenon, is the assumption of an individual regarding an event that have already occurred as expected, as if he knew it even before the event took place. This leads to the person believing they have a high sense of certainty of what the outcome would really be, even before the culminating of the event. This usually results to overconfidence or overestimation in recalling the sequence of events before the predicted bias.
There are 3 levels of hindsight bias Memory distortion - unable to recall the previous judgment ("I said it would happen").Inevitability - the event must happen even with or without the circumstances (“It had to happen”).Foreseeability - that belief and confidence wherein results of the event were already anticipated, even way before the event culmination (“I knew it would happen”).Which of the following is true of the blood-brain barrier? a. The barrier is formed by cells that line the capillaries of the brain. b. The barrier is uniform, protecting all brain structures. c. The barrier functions to regulate the chemical composition of the extracellular fluid surrounding the brain cells. d. The barrier pumps glucose out of the brain into the bloodstream.
Answers
Answer:
The barrier functions to regulate the chemical composition of the extracellular fluid surrounding the brain cells.
Explanation:
Blood-brain barrier
It is a very selective semipermeable membrane , hence allow some specific substance to pass via it . This barrier separates the extracellular fluid in the central nervous system and the circulating blood from the brain .
The barrier is composed of the endothelial cells .
Passive diffusion is shown in this system , and allows molecules like the water , glucose , amino acid to pass .
It regulates the chemical composition of the fluid of brain cell .
The blood-brain barrier, formed by cells lining the brain's capillaries, functions to regulate the chemical composition of the extracellular fluid surrounding brain cells, and isn't uniformly protecting all brain structures. Its primary role is not to pump glucose out of the brain into the bloodstream.
Explanation:The blood-brain barrier (BBB) is crucial to the health and function of the Central Nervous System (CNS), notably the brain and spinal cord. Rooted in its unique arrangement of blood vessels, the BBB holds strict control over what can move out of the circulatory system and into the CNS, shielding it from toxins or pathogens that may be present.The barrier is indeed formed by cells lining the capillaries of the brain, primarily endothelial cells form tight junctions, limiting the transfer of blood components to the brain. This excludes most microbes, hence there is no normal microbiota in the CNS. Furthermore, the blood-brain barrier also functions to regulate the chemical composition of the extracellular fluid enveloping the brain cells, not to pump glucose out from the brain into the bloodstream.
However, it's not accurate that the BBB is uniformly protecting all brain structures. Certain areas of the brain, like the choroid plexus and parts of the hypothalamus, have a more permeable barrier to allow specific molecules to pass through.
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Raven has just finished learning a list of nonsense words given to her by her psychology instructor as part of a class activity. She had 100 percent recall at the end of class. According to Ebbinghaus’s curve of forgetting, how quickly will Raven likely forget about 40 percent of the information she has just learned?
a. within the rst 20 minutes after leaving the classb. within the rst day after leaving the classc. nearly a week after the classd. nearly a month after the class
Answers
Answer:
Option (a).
Explanation:
Ebbinghaus Forgetting Curve may be defined as the curve that are used to determine the decreases ability of the brain to memorize the thing. This was first hypothesized by Ebbinghaus.
The ability of memorize the things will depend upon the individual and on the strength of the memory. As Raven was 100% recall the the end of class, she can forget the 40% memory by leaving at the rest 20 minutes after the class. The memory retain with her long that gas the high strength.
Thus, the correct answer is option (a).
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.a) as a method of the extraction of minerals, it was well establishedb) as a method of the extraction of minerals well establishedc) was a well-established method of mineral extractiond) was a well-established method of extracting mineral that wase) had been a method of mineral extraction, well established
Answers
"The correct option is c. was a well-established method of mineral extraction.
The sentence provided in the question is complex and requires a choice that fits grammatically and contextually. The sentence is discussing the historical context of leaching as a method for extracting copper, emphasizing that while the method was known, the role of bacteria was not understood until approximately 25 years ago from the time of writing. Let's evaluate the options: a) as a method of the extraction of minerals, it was well established - This option creates a non-restrictive clause with the commas, which is not incorrect, but it is somewhat awkward and less precise than the best answer. b) as a method of the extraction of minerals well established - This option is grammatically incorrect because it lacks a verb to connect ""as a method"" with ""well established."" c) was a well-established method of mineral extraction - This option is grammatically correct and clearly conveys that leaching was a recognized method for extracting minerals in the past. It fits the context of the sentence by indicating that the method was established before the discovery of bacteria's role. d) was a well-established method of extracting mineral that was - This option is incorrect because it ends with ""that was,"" which is grammatically incomplete and does not make sense in the context of the sentence. e) had been a method of mineral extraction, well established - This option uses the past perfect tense ""had been,"" which is not necessary since the simple past tense ""was"" suffices to indicate that leaching was established before the discovery of bacteria's role. Additionally, the comma before ""well established"" is unnecessary and disrupts the flow of the sentence. Therefore, option c is the most concise and grammatically correct choice that accurately reflects the intended meaning of the sentence."
A student formulated a hypothesis that cotton will grow larger bolls (pods) if magnesium is added to the soil. The student has two experimental fields of cotton, one with magnesium and one without. Which data should be collected to support this hypothesis?
Answers
Answer:
The comparison of the size between groups.
Explanation:
This is like a quasi experimental design, where you need to compare the two groups after you apply the stimulus to the experimental group.
To do this comparison you need to collect the size measurement data, that's when you're gonna support your hypothesis or not. Why size data between groups? Simply because your hypothesis is about larger growing cotton bolls, and that refers to size.
3. What 20th century discovery has been instrumental to the field of genetic engineering by allowing researchers to cut and splice specific DNA fragments into microorganisms?
a) Small RNAs
b) Restriction enzymes
c) Ribozymes
d) The microbiome
Answers
Answer:
b) Restriction enzymes
Explanation:
Restriction enzymes are the endonucleases that recognize and cut the specific DNA sequence and breakdown the DNA into smaller fragments.
With the discovery of these enzymes, it became possible to cut the genome of microbes or any other organism at the specific site.
For example, the restriction sequence for the restriction enzyme EcoRI is 5' GAATTC 3' on one strand and it cuts between G and A of the sequence and between A and G on the complementary strand.