Final answer:
Red blood cells burst or undergo hemolysis when placed in pure water due to the hypotonic environment causing water to flow into the cells more quickly than it can flow out. The cells' plasma membrane can only stretch so much before it breaks, releasing the cell's contents.
Explanation:
When human red blood cells are placed in pure water, they encounter a hypotonic solution. This means that the concentration of solutes is higher inside the cells compared to the surrounding water. As a result, water rushes into the cells through the process of osmosis, causing the cells to swell. Animal cells, including red blood cells, typically lack rigid cell walls that can resist the pressure of the incoming water. Instead, they have a plasma membrane that can only stretch to a limit.
Hemolysis is what occurs when red blood cells swell to the point where the plasma membrane is no longer able to contain the pressure, resulting in the cells bursting. The plasma membrane, which resembles a mosaic composed of lipids and proteins, has a fixed surface area and when this limit is exceeded by the swelling cell, it will lyse.
In a hypertonic solution, the water would flow out of the cells, causing them to shrivel up, a process called crenation. Conversely, in an isotonic solution, the movement of water in and out of the cell is equal, allowing the cell to retain its shape and function properly. Red blood cells lack the regulatory mechanisms many other cells have to prevent excess water uptake, which makes them particularly prone to hemolysis in a hypotonic environment like pure water.
On a 6-week postpartum visit a new mother tells the nurse she wants to feed her baby whole milk after 2 months because she will be returning to work and can no longer breastfeed. the nurse plans to teach the mother that she should switch to formula feeding because whole milk does not meet the infant's nutritional requirements for what
Answer:
The young infants do not possess the tendency to digest whole milk as easily or completely as they digest formula milk. In addition, the whole milk comprises higher quantities of minerals and proteins that can stress the immature kidneys of newborns and can result in extreme illness at the times of fever, heat stress, or diarrhea.
The whole milk is also devoid of the proper concentrations of vitamin C, iron, and other nutrients, which are required by the infants. It may also result in iron-deficiency in some of the infants. It also does not contain the healthiest kinds of fat for developing babies. Due to this it is recommended to not provide whole milk for the initial twelve months of life.
According to the cladogram, which characteristic was used to separate bony fish from amphibians?
A. jaws
B. cartilage
C. bony skeleton
D. lungs
Answer:
(D). lungs
Explanation:
Cladograms are diagrams that show cladistic relationship between organisms of different species on the basis of their characteristics. The cladograms may include characteristics to make two organisms different from each other.
In given cladogram, characteristic that separates bony fish from amphibians is 'lungs', as lungs are absent in bony fishes, while present in amphibians.
Thus, the correct answer is option (D).
Answer:
(D) . Lungs
Explanation : look above
We can tell from their structure that fatty acids are a good source of energy because of:
The ______ structure is a single virus unit, including the genetic material and capsid. envelope virion lysogenic icosohedral
Answer:
virion
Explanation:
The spinal cord is a thick column of nervous tissue that links the brain to the ____? a peripheral nervous system b muscular system c excretory system d endocrine system
The most plentiful source(s) of potential energy in the body is/are ____________
The most plentiful source of energy present in the body is Fat.
Explanation:
The body requires nutrient and energy in the form of Fat, Proteins and carbohydrates also known as the macro nutrient. Fats are the one which enables the metabolic function of the body.
Fats are of two types. Saturated Fat and unsaturated fat. Saturated fatty acids are not good as it is stored in the solid form and unsaturated fatty acids are good as stored in a liquid form. Fats are rich in energy which helps the body to protect it’s organs and provides energy for the smooth functioning of the system .
Final answer:
The most plentiful sources of potential energy in the body are the chemical potential energy stored in fat cells and carbohydrates, with glucose being a key immediate source and fats providing long-term energy storage. These sources are oxidized to release energy for the body to use.
Explanation:
The most plentiful sources of potential energy in the body are the chemical potential energy stored in the macromolecules, especially fat cells, carbohydrates, and proteins. While carbohydrates are the body's most readily available source of energy, fats store a larger amount of energy for long-term use. During metabolic processes, these substances undergo oxidation, releasing energy that is converted from potential to kinetic energy, which is used for various functions such as muscle contraction, neurotransmission, and synthesis of molecules.
Glucose is a form of carbohydrate that is especially important, as it is broken down into energy quickly through the process of glycolysis to form ATP, which is used immediately by the body's cells for energy. Conversely, the fat stored in adipose tissue can be broken down into fatty acids and glycerol, which are then used for energy during periods of fasting or intense physical activity.
Although sound energy from footsteps or energy given by a wind blowing at your back are examples of energy transfer, they are not sources of potential energy within the body. The true potential energy, as seen in the biological energy context, lies within the chemical bonds of food molecules and body tissues.
You are a marine biologist. what is the best way for you to follow reproducing corals? you are a marine biologist. what is the best way for you to follow reproducing corals? as spring progresses, move east. as spring progresses, move north. as spring progresses, move west. as spring progresses, move south.
The answer is ‘As spring progresses, move north’. Corals are known to release their eggs and sperms in a synchronized fashion. The eggs are then carried by an underwater ‘blizzard’ (current) that increases the chances of fertilization of the eggs by the sperms. The underwater blizzards occur regularly in cycles such as during lunar cycles, certain times of the year, tides and water temperatures.
Why does increased global movement of people increase the risk for pandemic flu? A-It decreases the population densities of urban areas.
B-It increases the transmission of flu between countries.
C- It decreases the responsiveness of national government.
D- It increases the evolution of treatment resistant flu virus.
Gel electrophoresis separates dna fragments according to their ________.
Gel electrophoresis separates DNA fragments according to their size. Nucleic acids are loaded into a gel matrix and an electric field moves them, with smaller fragments moving faster than larger ones, creating separation.
Explanation:Gel electrophoresis is a technique commonly used to separate biological molecules, particularly DNA fragments, based on their size. The process involves loading nucleic acids into a slot near the gel's negative electrode. Due to the negative charge of nucleic acids at neutral or basic pH in an aqueous environment, an electric field can mobilize them towards the positive electrode at the opposite end of the gel.
Size separation occurs due to the gel's porous matrix: smaller fragments move faster through the pores than larger ones, thus, creating a separation. This concept is visually manifested on the gel as bands at specific distances from the top, with each band representing DNA fragments of a particular size. A mixture of fragments varying in size may appear as a long smear, while uncut genomic DNA is often too large to run through the gel, creating a single large band at the top of the gel.
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A nurse is caring for a client with severe depression. the client reports changes in appetite and sleep pattern and has lost her job because of the effects of her depression. the client has two young children at home and states, "i just wish things could be like they were. i feel so helpless that i can't even get out of bed in the morning." the physician has ordered electroconvulsive therapy (ect) for the client in addition to her current antidepressant medications. a nurse evaluates the ect therapy as effective when the client:
Which diuretic remains effective when creatinine clearance drops below 25 ml/min?
This symbiotic relationship provides support for the theory of endosymbiosis, which states that A) animal-like cells evolved from ancestors that were photosynthetic. B) mitochondria and chloroplasts evolved from small prokaryotes living within larger cells. C) photosynthetic organisms, like today's land plants, evolved from photosynthetic bacteria. D) heterotrophic organisms could not have evolved before the evolution of photosynthetic organisms.
Chloroplasts and mitochondria developed from tiny prokaryotes that lived inside larger cells. The best choice is B.
What are chloroplasts and mitochondria?The idea that organelles like mitochondria and chloroplasts evolved from small prokaryotic cells that were engulfed by larger host cells is supported by the statement that "Mitochondria and chloroplasts evolved from little prokaryotes living within larger cells."
Both chloroplasts and mitochondria provide metabolic energy, have independent genetic systems, originated through endosymbiosis, and multiply through division. Compared to mitochondria, chloroplasts are bigger and more complex, and in addition to producing ATP, they also carry out a number of other vital functions.
The host cell benefited from the prokaryote's capacity for energy production (in the case of mitochondria) or photosynthetic capacity (in the case of chloroplasts), while the prokaryote benefited from the host cell's resources and protection.
Therefore, the correct option is B.
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Field studies are used to study animals in the laboratory?
True or false
Which of these help in the sexual reproduction of black bread mold
Zygospores help in the sexual reproduction of black bread mold. The correct answer is: a. Zygospores
Zygospores are structures formed during the sexual reproduction of black bread mold (Rhizopus stolonifer).
When conditions are favorable, two different mating strains of the fungus come into contact, and specialized hyphae called gametangia develop. These gametangia fuse to form a zygospore, which contains a diploid nucleus resulting from the fusion of haploid nuclei from each mating strain.Zygospores serve as the site of genetic recombination and exchange between the two mating strains. They undergo meiosis to produce haploid spores called sporangiospores, which are released into the environment. These sporangiospores can then germinate under suitable conditions to form new mycelia and continue the life cycle of the fungus.Ascospores and basidiospores are spores produced during the sexual reproduction of other fungi, such as ascomycetes (which produce ascospores in structures called asci) and basidiomycetes (which produce basidiospores in structures called basidia), respectively.While these spores play crucial roles in the life cycles of their respective fungi, they are not involved in the sexual reproduction of black bread mold.
The complete question is:
Which of these help in the sexual reproduction of black bread mold?
a. Zygospores
b. Ascospores
c. Basidiospores
Solar cells have many advantages. what is not one of these?
How does the cat's lymphatic drainage pattern compared to that of humans?
The cat lymphatic system protect the body’s immune system. Humans and cats have basically the same way of system. Lymph nodes, the spleen and the thymus are all common organs responsible for the production and drainage of antibodies. Lymph nodes had horizontal group and lymph receive from anterior abdominal wall bellow hip, buttocks and upper lateral thigh.
Cats and humans have similar lymphatic systems, but cats have fewer and less defined lymph nodes than humans.
Cats and humans share similarities in their lymphatic drainage patterns, but there are also notable differences. Like humans, cats have a network of lymphatic vessels and lymph nodes throughout their bodies that play a crucial role in immune function and fluid balance. Both species rely on lymphatic vessels to transport lymph fluid, which contains white blood cells and waste products, back to the bloodstream.
However, one key difference is the organization of lymph nodes. While humans have numerous lymph nodes clustered in specific regions like the neck, armpits, and groin, cats have fewer and less defined lymph nodes. Cats tend to have more diffuse lymphatic drainage patterns, with lymph nodes located along major blood vessels and organs rather than concentrated in specific areas.
Additionally, the size and location of lymph nodes may vary between cats and humans due to anatomical differences. Despite these variations, the overall function of the lymphatic system in both species remains vital for maintaining health and immunity.
What are the four different type of bases in DNA and how do they pair
One of the best ways to distinguish how much genetic and environmental factors affect behavior is to compare children who have the same genes but different environments. similar genes and environments. the same genes and environments. different genes and environments.
One of the best ways to distinguish the way much genetic and environmental factors affect behavior is to compare children who have the same genes but different environments. The correct option is A.
What are genetic factors?Many diseases are influenced by genetic factors. This means that some, if not all, of the risk is inherited from one's parents.
CADASIL is one of these diseases that is caused by an abnormality in a single gene. Genes produce proteins that are required for the body to function normally.
Understanding genetic factors and genetic disorders is essential for learning more about health promotion and disease prevention.
Genes, through their influences on morphology and physiology, create a framework within which the environment acts to shape an individual animal's behavior.
The environment can impact anatomical and morpho - physiological advancement, and behavior and attitude develops as a consequence of the shape and internal workings of the animal.
Thus, the correct option is A.
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which was least likely to have been a component of earths atmosphere before life began?
oxygen
water vapor
carbon dioxide
sulfur
Answer:
oxygen
Explanation:
Earth's early atmosphere before life began was devoid of oxygen. Intense volcanic activity occurred for around a billion years and the earth's surface was in molten state. When it started to cool early atmosphere was formed from the gases emitted by volcano. It contained carbon dioxide, methane, hydrogen sulphide, ammonia and small amounts of water vapor. But this atmosphere had no trace of oxygen.
The water vapor condensed and formed oceans. Photosynthesis by early plants finally released oxygen which became a part of atmosphere. Carbon dioxide was also used up in various cell processes and trapped in rocks and fossil fuels which decreased its share in atmosphere.
Which environments were most common to find algae?
Algae live in bodies of water and damp places and are commonly found in both aquatic and terrestrial environments. Terrestrial algae mostly live in moist, tropical areas. They prefer wet places because they do not have vascular tissues and the other necessary adaptations to survive on land.
The medical term used to describe a chronic condition of long-lasting, severe pain around the vaginal orifice, which feels raw is
The Atlantic Ocean gets about 3-5 ______ wider each year.
3 to 5 centimeters per year is a good average to use for the Atlantic Ocean. Spreading in the Pacific is faster.
What compound is produced during regeneration?
What do karotypes and pedigrees have in common?
Answer:
A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors from one generation to the next, most commonly humans, show dogs, and race horses.
Explanation:
A client in the intensive care unit (icu) is on a dobutamine drip. during an assessment the client states, "i was feeling better but now my chest is tight and i feel like my heart is skipping." physical assessment reveals a heart rate of 110 beats per minute and blood pressure of 160/98 mm hg. what is the nurse's immediate concern for this client
The form of rna that carries the code from the dna to the site where the protein is assembled is called
A client has received a diagnosis of portal hypertension. what does portal hypertension treatment aim to reduce? select all that apply.
In the initial period of learning, ________ describes when an organism learns to connect a neutral stimulus and an unconditioned stimulus. acquisition conditioning extinction neutral stimulate
Answer:
Option A, Acquisition
Explanation:
The first stage of learning is known as acquisition. It causes establishment of responses by pairing of Neutral stimulus, conditioning and un-conditioning stimulus. Once the association between a neutral stimulus and conditioned stimulus is established, the responses are acquired.
For example – If a bird is trained to pick a key whenever there is a sound of a bell, then after certain period of time an association will be established between the “ringing of bell” and “picking up of key” activity. Therefore, whenever the bird will hear the ringing sound it will search for key to be picked.
Thus, option A is correct.
In the initial period of learning acquisition helps an organism to learn to connect a neutral stimulus and an unconditioned stimulus.
Further Explanation:
Stimulus is anything that induces any particular working reaction in an organ or the tissue.
An unconditioned stimulus elicits the unlearned response and an unconditioned response is the naturally occurring response
Classical conditioning is a kind of learning wherein a subject starts to respond to neutral stimulus as it would do to another stimulus by learning the way to connect the two stimuli
Acquisition can be defined as the duration of learning in Classical conditioning where human or any other animal starts to link a neutral stimulus and an unconditioned stimulus which allows the neutral stimulus to start exhibiting the conditioned response.
Extinction can be defined as the progressive weakening and eventually fading of the conditioned response.
Neutral stimulus can be defined as the stimulus which before conditioning do not produce any specific response.
Conditioned stimulus are the neutral stimulus that starts eliciting a conditioned response once it pairs with an unconditioned stimulus.
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Answer Details:
Grade: College biology
Subject: Biology
Chapter: Learning and memory
Keywords:
Stimulus, organ, tissue, unconditioned stimulus, acquisition, animal, neutral stimulus, conditioned response, extinction.
WILL GIVE MEDAL! PLEASE HELP!
what happens to the body if the urinary system no longer functions?
A- the body cannot fight infections
B- toxic cellular waste builds up
C- nutrients cannot reach cells
D- oxygen cannot reach cells.,
B- toxic cellular waste builds up
What are some problems that can occur from an altered gene that makes hemoglobin?
The most common is the development of sickle cell anemia. This is as a result of a mutation in the hemoglobin gene that affects the beta polypeptide chain of the protein. This reduces HB’s affinity to oxygen. Other problems include Thalassaemia, Porphyria, and Carbon Monoxide Poisoning.
Answer:
what he said^^^^^^^^^^^^^^^^^^^
Explanation: