The rate at which blood flows through the human body changes in response to many factors. Which statement describes one of these factors and its effect on blood flow?
A.The narrowing of blood vessels increases pressure and leads to faster blood flow.
B. High blood viscosity increases the resistance in the blood vessels and leads to slower blood flow.
C. Low blood pH decreases the rate of diffusion through the blood vessels and leads to slower blood flow.
D.The changing of the shape of red blood cells to a crescent shape decreases resistance and leads to faster blood flow.
High blood viscosity increases the resistance in the blood vessels and leads to slower blood flow describes one of these factors and its effect on blood flow. Thus, option B is correct.
What is viscosity?The thickness of a liquid in known as viscosity or its property of being sticky and its consistency which is created due to the friction present inside it.The unit of viscosity is newton- second per square meter and it is written as pascal-second in SI system.
There are several methods by which viscosity is measured and these are rotational rheometry, non-contact rheology, vibrating viscometers, capillary viscometers.
The viscosity of honey is 3,200.0, viscosity of peanut butter is 250,000.0 it means different items have different viscosity.
Therefore, High blood viscosity increases the resistance in the blood vessels and leads to slower blood flow describes one of these factors and its effect on blood flow. Thus, option B is correct.
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Process that requires oxygen is called
How does budding in yeast resemble fission in paramecium? How does it Differ?
Binary fission and budding are both the procedures of asexual reproduction. They are both very identical; however, they do possess certain differences. They are regarded as the most basic methods of asexual reproduction.
Binary fission takes place majorly in unicellular species. When the species has to reproduce its cell goes via the phases of mitosis. However, when it attains cytokinesis it divides into two distinct organisms.
Budding is another kind of asexual reproduction. In this process, a new species called bud originates from the original organism. As soon as the bud possess the tendency to survive on its own it distinguishes itself from the original organism.
It takes place in both the multicellular organisms and unicellular organisms. However, unlike binary fission, it takes place from an unequal division of the reproducing organism.
List three reasons that can help explain why it is important to distinguish different tastes?
This tissue’s function is to transport sugars from the leaves to the other areas of the plant.
Answer:
Complete each statement to make it true.
Vascular tissue’s main function is
Vascular tissue runs
Select whether each statement is describing xylem or phloem.
This tissue’s function is to transport sugars from the leaves to the other areas of the plant.
This tissue’s function is to transport water from the roots to the leaves.
Explanation:
Describe how comparing early development can help scientists learn about the relatedness of species. give an example!
Talking of early development we are referring to the embryonic stage of development. The closer similarity of their embryos shows a relationship between the organisms. For example an adult chimpanzee and an adult human being look so different and on the other hand their embryos look so much alike.
Comparing early development in species helps to understand their relatedness by identifying homologous structures stemming from common ancestry. Embryonic similarities such as gill slits that appear in all vertebrates demonstrate shared evolutionary paths. These comparisons aid in the construction of phylogenetic trees to visualize evolutionary relationships.
Explanation:Understanding Species Relatedness Through Early Development
Comparing the early development of different species can reveal their evolutionary relationships. Scientists look for homologous structures, which are features that are similar due to shared ancestry. An example of this is the presence of gill slits in the embryos of all vertebrates, including humans, which indicates a common ancestral origin. Moreover, scientists use embryology, the study of an organism's development from embryo to adult, to find these connections. The development patterns can help distinguish between homologies and analogies, the latter being similarities due to convergent evolution rather than common ancestry.
For instance, while bats, birds, and insects all have evolved wings for flight, the embryonic origin and structural makeup of these wings differ significantly. Birds and bats have homologous structures in their wings suggesting a closer evolutionary relationship, whereas insect wings are analogous and do not imply close relatedness. Such comparisons enable researchers to construct phylogenetic trees, illustrating the evolutionary pathways of different species.
A(n) __________ is not associated with structural deformation.
Select all that apply. All cells have similar structures, including _____. a plasma membrane vacuoles cell wall cytoplasm chloroplasts protoplasm NEXT
Explain what happens in the large intestine to cause diarrhea or constipation. how does the function of the large intestine relate to another key resource?
Answer: Diarrhea or constipation can be caused when the muscles of the large intestine do not function properly
Explanation: Diarrhea is caused when an infection or illness cause the body to release too much water into the intestines in order to flush them out. Constipation is the opposite; not enough fiber causes a backup of stool in the large intestine. The colon's main job is to absorb water, nutrients and electrolytes from partially digested food, the rest is pushed down as waste (feaces)
Muscles in the colon work to get rid of the body's waste products. They contract and relax as they push the undigested food through the large intestine. If the muscles in the colon don't work at the right speed for proper digestion or if the coordination with muscles in the rectum or pelvis is interrupted, the contents of the colon can't move along smoothly. When this happens, a person can feel the belly cramps, bloating, constipation, and diarrhea
Diarrhea and constipation are caused by disruptions in the GI tract's normal function in the large intestine, resulting in loose or hardened stools.
Diarrhea occurs when the large intestine discharges its contents before water reabsorption is complete, resulting in loose stools. Conversely, constipation happens when the colon retains contents for too long, leading to hardened feces. Both conditions are caused by disruptions in the GI tract's normal function.
Which type of microscope is needed to view a virus in the laboratory?
What conclusion would be MOST appropriate about the genetic variation between humans and the three apes as illustrated by the phylogenetic tree? A) Genetic variation between all four organisms is non-existent. B) The genetic variation between all four organisms is about the same. C) The genetic variation between humans and orangutans is the greatest. D) Humans branched off from the other three animals due to great genetic variations.
Answer:
The genetic variation between humans and orangutans is the greatest.
Explanation:
Humans and orangutans are farthest from each other in the tree, indicating the greatest biomolecular differences or genetic variations. The branches tell us that there are genetic differences; we cannot say from the tree that the amount of differences are equal.
2. On which date does the Antarctic Circle have 24 hours of daylight? (1 point)June 21
March 21
September 21
December 21
3. When energy is transferred to air, what happens to the particles of air? (1 point)They move slower.
They move faster.
They cool down.
none of the above
Answer:
2. December 21
3. They move faster.
Explanation:
2. The midnight sun or polar day is a natural phenomenon observable in the north of the Arctic Circle and south of the Antarctic Circle, consisting of that, on dates close to the summer solstice, the Sun is visible 24 hours a day.
3. The energy makes the air particles move faster, they collide with others that are at a lower temperature, that move more slowly. As they collide, fast particles yield some of their energy to slower ones. These in turn collide with other adjacent particles. This process continues until the energy is extended to all the particles of the air that was initially at a lower temperature. Finally they all reach the same kinetic energy and consequently the same temperature.
Which one is NOT true of deep ocean trenches? A. They are associated with mid ocean ridges B. They are part of active continental margins c. They are sites where plates plunge back into the mantle d. They are long and narrow depressions at subduction zones
Deep ocean trenches are not associated with mid-ocean ridges. The correct option is A.
What is a Deep ocean trench?
Deep ocean trenches are actually associated with subduction zones, which are areas where one tectonic plate is being forced beneath another plate.
They are typically located at the boundaries of tectonic plates where oceanic crust is being subducted beneath either another oceanic plate or a continental plate.
Mid-ocean ridges, on the other hand, are divergent boundaries where tectonic plates are moving away from each other, resulting in the upwelling of molten material from the mantle and the formation of a new oceanic crust.
These ridges are characterized by volcanic activity and the creation of new seafloor.
Therefore, the correct statement should be "A".
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What can a stem cell do that most body cells cannot do?
Distinguish between the structure of pyrimidines and purines. explain why adenine bonds only to thymine.
Final answer:
Pyrimidines, such as cytosine and thymine, are single-ringed structures, while purines, like adenine and guanine, are double-ringed. Adenine bonds only to thymine because they can share two hydrogen bonds, maintaining DNA's stable helix structure.
Explanation:
Distinguishing Between Pyrimidines and Purines
The structure of DNA nucleotides includes two distinct types of nitrogenous bases known as pyrimidines and purines. Pyrimidines are single-ringed structures and include cytosine (C) and thymine (T). In contrast, purines are double-ringed structures represented by adenine (A) and guanine (G).
When it comes to the bonding of these bases, adenine forms bonds only with thymine due to the ability of these to share two hydrogen bonds. This selectivity in bonding is also facilitated by the way DNA structures its nucleotide pairings—one purine with one pyrimidine—providing the necessary spacing to maintain the helix's integrity. The double-ring of a purine and the single-ring of a pyrimidine together form a pairing of a consistent shape and size, critical for the DNA structure. For this reason, adenine cannot pair with another purine such as guanine because it would create too much spatial hindrance, nor can it pair with another pyrimidine like cytosine due to excessive spacing.
So, adenine bonds only to thymine due to their matching ability to create two hydrogen bonds and the structural conformity that results when a purine is paired with a pyrimidine, thereby maintaining the optimal width of the DNA helix.
The presence of mucus and pus in the stools suggests which condition?
The presence of mucus and pus in the stools typically indicates an infection in the digestive system. This could be caused by various bacteria, leading to intestinal inflammation and associated symptoms. A stool sample would be required to confirm the diagnosis and identify the cause.
Explanation:The presence of mucus and pus in the stools suggests a condition involving an infection in the digestive system. This could be due to a bacterial infection such as Shigella, Salmonella, C. jejuni, or E. histolytica; or a result of the overgrowth of opportunistic bacteria like Clostridium difficile when the normal intestinal flora is disturbed. These infections generally cause inflammation and damage to the intestinal lining, leading to the presence of pus and mucus in the stools.
They can cause symptoms like diarrhea (which may also contain blood), stomach cramps, and fever. Due to the nature of these conditions, a physician may order a stool sample for testing in order to confirm the diagnosis and determine the causative agent. Treatment will then be prescribed based on the identified cause.
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How did early cyanobacteria affect the physical and chemical conditions on earth?
Early atmosphere of earth had less oxygen (had more carbon dioxide and ammonia) hence was a non-reducing atmosphere. Most bacteria that thrived were anaerobes. However, the emergence of cyanobacteria approximately 3.5 million years ago filled the atmosphere with oxygen. This is because cyanobacteria respire out oxygen. The atmosphere thenceforth became reducing and hence most anaerobes perished while aerobics thrived. This is referred to as the Great Oxidization Event. The formation of ozone layer also enabled thriving of life since the UV light from sunlight was blocked and hecne could not damage organic molecules.
Mr. jones has a large kidney stone that is obstructing the flow of urine in his left kidney, resulting in kidney enlargement and backing up of urine into his ureter. this is known as:
The four visual cues are most associated with the part of the brain known as the ____.
The occipital lobe of the brain is associated with the four visual cues which are color, form, movement, and depth. This part helps in interpreting the visual information from the eyes.
Explanation:The four visual cues are most associated with the part of the brain known as the occipital lobe. This part of the brain is at the back of the head and is primarily involved in vision processing. It interprets visual cues from the eyes, transforming light and color information into images.
The four key visual cues processed by the occipital lobe include color, form, movement, and depth. These cues help us to understand and interact with the world around us in a meaningful way.
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True or false: the smallest unit in a worksheet is a cell.
Answer:
True
Explanation:
A patient with which type of burn should always get professional medical help?
The least amount of atp is produced in which stages of cellular respiration
The least amount of ATP is produced in the Krebs cycle of cellular respiration. This stage produces only two molecules of ATP.
What are the different stages of cellular respiration?There are three different stages of cellular respiration are there:
Glycolysis: Breakdown of glucose into pyruvate.The Krebs cycle: Pyruvate gets converted into acetyl-CoA which enters TCA.Electron transport chain: The product of the TCA cycle enters into the electron transport chain.The process of glycolysis produces 4 ATP and 2 NADH. But 2 ATP is spent which leads to the net production of 2 ATP and 2 NADH. The process of the Krebs cycle involves the breakdown of acetyl-CoA into 2 ATP, 8 NADH, and 2 FADH2. While the process of the electron transport chain produced 34 molecules of ATP with the help of the conversion of all energetic carriers.
Therefore, the least amount of ATP is produced in the Krebs cycle of cellular respiration. This stage produces only two molecules of ATP.
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Complex carbohydrates, such as fruits and vegetables, are universally viewed as healthier than simple carbohydrates like sugar. Why are complex carbohydrates a better dietary choice?
Explanation:
Complex carbohydrates like fruits, vegetables, whole grains, beans, peas etc. They contain vitamins, minerals and fibres, that's why they are the source of long lasting energy because they take long time to digest.
Complex carbohydrates are healthier than simple carbohydrates like sugar are present in fruits, table sugar, soft drinks, milk and milk products etc. They digested quickly not the long lasting as complex carbohydrates, they can easily broken down by the body.
Complex are better dietary choice because it contains more nutrients than simple carbs. They are high in fibre and digested slowly, this is the better way for weight control.
List three things that happen to air when it enters the nasal cavity. what are cilia?
In the process of genetic engineering, what is the correct order of the steps?
The correct order of steps in the process of genetic engineering is: identify desirable gene, isolate gene, insert gene into vector, introduce vector into host organism, allow replication and expression, and screen for successful incorporation and expression.
Explanation:The correct order of steps in the process of genetic engineering is as follows:
Identify the desirable trait or gene that you want to introduce into the organism.Isolate the gene from the source organism using molecular cloning techniques.Insert the gene into a vector, such as a plasmid.Introduce the vector into the host organism, often using a technique called transformation.Allow the host organism to replicate and express the foreign gene.Screen for successful incorporation of the foreign gene and verify its expression.Learn more about genetic engineering here:https://brainly.com/question/34206889
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4. Energy is supplied by which of the following? (5 points)
fats
carbohydrates
proteins
all of the above,
the answer ould be d. all of the above
The nurse has provided instructions to a client who will receive alteplase for the treatment of acute myocardial infarction. the nurse determines that teaching was effective if the client states that the main action of alteplase is what?
The function of nad+ is to select one:
a. cause the release of energy to adjacent cells when energy is needed in aerobic conditions.
b. hasten the release of energy when the cell has been deprived of oxygen.
c. carry hydrogen atoms and electrons.
d. block the release of energy to adjacent cells.
e. convert the potential energy of the proton gradient into the chemical energy in atp.
The function of NAD+ is to carry hydrogen atoms and electrons. The correct option is C.
What is NADH?Nicotinamide adenine dinucleotide (NAD) plus hydrogen (H) is referred to as NADH. It occurs naturally in the body and contributes to energy production. The body generates NADH, which is used to produce energy.
This word is used to refer to the same molecule's reduced and oxidized versions. The oxidized form of NAD+ is one in which it has lost an electron. As the molecule's reduced form, NADH receives the electron that was lost by NAD+.
The powerhouses of the cells, the mitochondria, are where ATP, the energy currency, is made. Every cell in your body has mitochondria, which function as little engines or energy makers.
Thus, the correct option is C.
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Choose the correct anatomical sequence that presents the order in which food passes through the digestive system of a mammal. see concept 41.3 (page 903)
Food enters through the mouth, where teeth perform the initial breakdown of food into smaller particles and mix it with saliva. The food passes down the pharynx situated behind the mouth and nose, down into the oesophagus, into the, stomach where further breakdown of food occurs, into the small intestine and finally into the large intestine.
April wants to add _____ to her salad, because the food is a naturally rich source of omega-3 fats.
The answer is walnuts. Wall nuts are rich in vitamin E, omega – 3 fats and antioxidants; eating or consumption of walnuts everyday may support brain health and increase young adult’s inferential reasoning. It is recommended that an ounce or 28 grams of nuts per day is good, it is as much as the size of a palm of a hand.