Steroid hormones cause protein synthesis in the cell. So the correct option is Option B.
For both steroid and thyroid hormones, binding of the hormone-receptor complex with DNA triggers transcription of a target gene to mRNA, which moves to the cytosol and directs protein synthesis by ribosomes. A steroid hormone directly initiates the production of proteins within a target cell. The steroid hormones are synthesized in the adrenal cortex, the gonads, and the placenta; are all derived from cholesterol and many are of clinical importance. Steroid hormones are synthesized in the mitochondria and smooth endoplasmic reticulum. The steroid hormones are synthesized in the adrenal cortex, the gonads, and the placenta; are all derived from cholesterol and many are of clinical importance. Steroid hormones are synthesized in the mitochondria and smooth endoplasmic reticulum.
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choose the 4 main groups of biological macromolecules.
Answer:
carbohydrates, lipids, protein, and nucleic acids
Explanation:
These are the 4 biomolecules/ biological macromolecules :)
3. What does research show about
relationships?
O A. Hobbies are more
psychologically
fulfilling.
B. Married couples are often very
similar.
C. Extroverts most often date
introverts.
D. Personality types have no impact
on relationships.
Answer:
b
Explanation:
Which development gene is responsible for determining the body axes?
The development gene that is responsible for determining the body axes in animals is called the "Hox" gene family.
During embryonic development, the Hox genes are essential for developing the body plan and patterning the body along the anterior-posterior axis.
Hox genes are a family of transcription factors that regulate the expression of downstream target genes along the anterior-posterior axis in particular locations. More posterior genes are active later in development, and they are arranged in clusters and activated in a particular order. Each segment of the growing embryo receives the proper set of Hox gene signals thanks to this temporal and spatial activation pattern, which in turn defines the particular developmental fate of that segment.
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a litter of mice from the mating of two agouti black parents includes offspring with the following fur colors: solid color, black solid color, brown (sometimes called chocolate) agouti black agouti brown (sometimes called cinnamon) what would be the expected frequency of agouti brown offspring in the litter? view available hint(s)for part a in mice, agouti fur is a dominant trait resulting in individual hairs having a light band of pigment on an otherwise dark hair shaft. a mouse with agouti fur is shown here, along with a mouse with solid color fur, which is the recessive phenotype (a
In mice, agouti fur is a dominant trait resulting in individual hairs having a light band of pigment on an otherwise dark hair shaft. the expected frequency of agouti brown offspring in the litter would be 3/16.
When one allele (variant) of a gene is present on one copy of a chromosome, and its effects of the other allele (variant) of the same gene on the other copies of the chromosome can be suppressed or overridden. This is known as dominance. Recessive describes the second form whereas the dominant characterizes the first. The fundamental cause of the phenomenon of two unique variants of the same genes on each chromosome is a gene mutation, either new (de novo) or inherited. Autosomal dominant and autosomal recessive are names which is used to describe traits of gene variations on non-sex chromosomes (autosomes), whereas X-linked dominant, X-linked recessive, and Y-linked are the terms which are used to describe traits of gene variants on sex chromosomes (allosomes).
The complete question is:
In mice, agouti fur is a dominant trait resulting in individual hairs having a light band of pigment on an otherwise dark hair shaft. A mouse with agouti fur is shown here, along with a mouse with solid color fur, which is the recessive phenotype (A = agouti; a = solid color). A separate gene, which is not linked to the agouti gene, can result in either a dominant black pigment or a recessive brown pigment (B = black; b = brown).A litter of mice from the mating of two agouti black parents includes offspring with the following fur colors:
solid color, black
solid color, brown (sometimes called chocolate)
agouti black
agouti brown (sometimes called cinnamon)
What would be the expected frequency of agouti brown offspring in the litter?
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on which of the plates would you expect to find bacteria most like the original non-transformed e. coli colonies you initially observed? explain your predictions.
Plate 1 contains only LB agar, which is a growth medium used to culture E. coli bacteria. Here option A is the correct answer.
The original non-transformed E. coli colonies are likely to be found on this plate, as it does not contain any selective pressure that would eliminate or change the bacteria.
The antibiotics present on Plate 2 and Plate 4 can act as selective pressure and kill or suppress the growth of the E. coli colonies, and the transformation mixture on Plate 3 and Plate 4 can cause genetic changes in the bacteria, leading to the formation of transformed colonies that are different from the original non-transformed colonies.
Therefore, Plate 1 is the plate on which you would expect to find bacteria most like the original non-transformed E. coli colonies, as it does not contain any elements that would eliminate or change the bacteria.
Complete question:
On which of the following plates would you expect to find bacteria most like the original non-transformed E. coli colonies you initially observed?
A. Plate 1: LB agar
B. Plate 2: LB agar + antibiotics
C. Plate 3: LB agar + transformation mixture
D. Plate 4: LB agar + antibiotics + transformation mixture
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what is the purpose of heating the slide during the staining process? what is the purpose of heating the slide during the staining process? kills the bacteria and adheres it to the slide separates the bacteria from one another for better visualization eliminates contaminating bacteria allows for further penetration of the stain through the lipoidal wall and into the cytoplasm
Some bacteria are killed by heat fixation, but it is primarily used to adhere bacteria to a slide so they won't rinse off during the staining process in cell.
Iodine is added, and it binds to crystal violet, trapping it inside the cell. swift colour removal using acetone or ethanol. using safranin as a counterstain. The smear's bacteria are destroyed by heat fixing, which also effectively fixes the smear to a slide and makes it easier for the sample to absorb stains. Let the smear dry naturally. Heat fixing this same specimen to a slide is the name of this procedure. In order to prevent the specimen from washing off the slide during staining, it binds the sample to the slide. The cells' permeability to the staining dyes is also increased by heat fixation, which kills the cells.
(what Is the purpose of heating the slide during the staining process ?
A.) allows for further penetration of the stain through the lipoidal wall into the cytoplasm
B.) eliminates contaminating bacteria
C.) kills the bacteria and adheres it to the slide)
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Why is the energy from a molecule of ATP required by thesodium-potassium pump?It helps the sodium and potassium ions bind to the pump binding sites.It provides the energy required to move sodium and potassium ions against their concentration gradients.It provides the energy required to ionize sodium and potassium.It helps prevent other molecules from being transported by the pump.
To assist in preserving a positive membrane potential, the sodium-potassium pump undergoes periodic form changes. Three sodium ions leave the cells three times throughout each cycle.
What function does ATP serve?When the cell needs fuel, ATP can be drawn out and utilized to fuel events or stored for use in later ones. Animals use ATP to preserve the energy released during meal digesting.
Where does ATP fit into biology?The organelles, the cell organelles where aerobic system occurs, are where ATP is generated. This is why the term "powerhouse of the cell" is commonly used to describe organelles.
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is the theory of convergent evolution supported by the differences between species found on the mainland and island? why or why not?
The theory of convergent evolution can be supported by differences between species found on mainland and island ecosystems. Convergent evolution is the process by which unrelated species
independently evolve similar adaptations in response to similar environmental pressures. Islands are often isolated from the mainland and can have unique environmental conditions, such as different climate patterns, biotic pressures, and limited resources. This can lead to the evolution of unique adaptations in island species that are not found in mainland species.
For example, flightless birds, such as ostriches and penguins, are found on different continents but have evolved similar adaptations for survival on their respective islands, despite being evolutionarily unrelated. Similarly, cacti found on mainland and island ecosystems have evolved similar adaptations to cope with arid conditions, such as water-storing tissues and spines for protection from herbivores.
These examples support the theory of convergent evolution, as they demonstrate that unrelated species can evolve similar adaptations in response to similar environmental pressures. However, it is important to note that convergent evolution is not always evident in every comparison of mainland and island species, as the evolutionary history of each species is unique and can be influenced by a variety of factors.
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when a black mouse is mated to a brown mouse, all of the progeny are black. what can you tell about the genotypes of the parents?
When a black is mated to a brown mouse, all of the progeny are black. This tells us that the genotypes of the parents are homozygous each.
The cross between a black mouse and a brown mouse can be explained with the help of the Mendelian monohybrid cross. Monohybrid cross is used to illustrate the inheritance of only single character from the parents to the offsprings. Here, the character inherited is the color of the mouse. If the F1 progeny produced after the cross of the parents is expressive of one of their parents, this means that the character expressed is dominant over the other. Hence, black color is dominant over brown color. The parents, therefore, were homozygous dominant, say BB for black, and homozygous recessive, say bb for brown.
Mendel provided the first scientific justification for inheritance in 1866. He developed rules after conducting a number of scientific research on garden peas. known as Mendel's Laws of Inheritance. His output is referred to as Mendelism.
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Which one of the following contains the genetic material of a eukaryotic cell?A. Golgi apparatusB. MitochondriaC. NucleolusD. Nucleus
Option D is correct- Nucleus. Eukaryotes are organisms whose cells additionally contain membrane-bound organelles to their nucleus.
Because certain eukaryotic cell components are separated from the rest of the cytoplasm by internal membranes, eukaryotes can be distinguished from the prokaryotes group of organisms. These objects enclosed by membranes are called organelles. The DNA, or genetic material, is arranged into long molecules in eukaryotes called chromosomes and is kept in an organelle called the nucleus. Other organelles found in eukaryotic cells are the mitochondria, which generate energy, the endoplasmic reticulum, which helps transport proteins, and the Golgi apparatus, which organizes and packages proteins and lipids for transport inside the cell. Additional organelles called chloroplasts are used in plant cells to absorb solar energy.
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incisions are made in the gingiva or mucosa to allow for separation of the surface tissues, epithelium and connective tissues) from the roots and alveolar bone. this is called: group of answer choices a) bone replacement grafts b) periodontal flaps c) guided tissue regeneration d) placement of periodontal dressing
Incisions are made in the gingiva or mucosa to allow for separation of the surface tissues, epithelium and connective tissues from the roots and alveolar bone. this is called: periodontal flaps.
Periodontal flap is surgical technique which is used in periodontics to have the accessibility to the roots of teeth and the surrounding alveolar bone to treat periodontal disease.
The incisions are made in the gingiva or mucosa, and the flaps are reflected to expose the roots and underlying bone. This allows for cleaning and smoothing of the roots, removal of any diseased tissue, and possibly grafting of bone or other materials to promote healing and regeneration.
Some other techniques used in periodontics are: Bone replacement grafts, guided tissue regeneration, and placement of periodontal dressing.
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the basal body, hook, and filament are components of in bacteria. true or false
This statement is true. The basal body, hooks, and filaments are the building blocks of bacterial flagella.
Bacterial flagella are motility systems commonly found in motile species. Flagella are supramolecular structures composed of about 20 protein components, which are divided into three substructures. Filaments, hooks, and basal bodies. Bacterial flagella can be divided into at least three parts, Body, hook, filament. The basal body is embedded in the cell membrane and functions as a rotary motor. Hooks and filaments extend outside the cell. The filament acts as a spiral propeller. The basal body, hooks, and filaments are the building blocks of bacterial flagflagellaella.
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Shin splints are usually caused by overuse or improper conditioning of the leg muscles (True Or False)
It is true that the overuse or improper conditioning of the leg muscles is the main cause of shin splints.
What are Shin splints?Shin splints, sometimes referred to as medial tibial stress syndrome, are a frequent overuse condition that mostly affects the front and inside of the shin bone in the lower leg (tibia).
The muscles, tendons, and bones in the lower leg are repeatedly stressed and strained in this condition, frequently as a result of overuse or poor training.
Running or leaping on hard surfaces, stepping up the intensity or duration of exercise too rapidly, wearing unsuitable or worn-out footwear, and having weak or imbalanced leg muscles are all common causes of shin splints. Shin splints cause pain along the inner rim of the shin bone, which can be anything from a faint ache to a searing pain.
Shin splints are typically treated with rest, ice, and over-the-counter painkillers. Orthotics, physical therapy, and other therapies could be required in severe situations.
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the likelihood of osteoarthritis affecting a single joint is ______________ that of rheumatoid arthritis.
the likelihood of osteoarthritis affecting a single joint is lower than that of rheumatoid arthritis.
Rheumatoid arthritis is an autoimmune illness because it results from the immune system attacking healthy human tissue. However, the cause of this is unknown at this time. To combat illness, your immune system frequently produces antibodies that specifically target viruses and bacteria.
Typical symptoms of rheumatoid arthritis include throbbing and excruciating soreness in the joints. Often, it worsens right after being idle and first thing in the morning.
Rheumatoid arthritis (RA), a highly serious inflammatory disorder, causes excruciating joint pain, stiffness, excessive tiredness, and sporadic deformity. It commonly affects the hands, shoulders, knees, and/or feet.
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One solution to decreasing global temperatures is to use ____
1)less solar energy
2)more fossil fuels
3)less nucular energy
4)more biofuels
Answer:
Option D
One solution to decreasing global temperatures is to use ____
More Biofuels
in certain plants, tall is dominant to short. if a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? in certain plants, tall is dominant to short. if a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? 1/4 0 1 1/2
Answer: the offspring will not be short
Explanation: in every possible cross, the offspring has an allele for tall. if a dominant allele is present, the individual will express the dominant trait
which nerve network traveling through the brainstem plays an important role in controlling arousal?
The reticular activating system (RAS) plays an important role in controlling arousal and wakefulness in the brainstem.
The complex network of nerves known as the reticular activating system (RAS) in the brain controls changes in wakefulness and sleep-wake cycles. 1 It serves as a filter to remove extraneous noise that can hinder or delay message processing while you're sleeping.
The reticular activating system (RAS), which is distributed throughout the brainstem of vertebrate brains, is a part of the reticular formation.
Damage to the RAS results in unconsciousness, which prevents one from being awake or cognizant. The medial group of nuclei and the small group of nuclei are two lateral groups of nuclei that run the length of the brainstem. Midline raphe nuclei also exist there.
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Cell structure immediately external to the cytoplasm is the??????
Cell structure which is present immediately external to the cytoplasm is the cell membrane.
The cell membrane which is also known as the plasma membrane, is basically found in all the cells and separates the internal environment of the cell from the exterior of the cell. The cell membrane basically is composed of a lipid bilayer which is semipermeable in nature.
The cell membrane gives the cell it shapes, provides rigidity and also performs the function of regulating the transport of the materials that are entering and exiting the cell. The cell membrane is made up lipids as well as proteins. It the cell structure which is present immediately outside the cytoplasm.
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Which evolutionary mechanism results in an adaptation within a species?
Natural selection is the only mechanism that results in organisms adapting to their environments, making it unquestionably a crucial mechanism of allele-frequency change.
However, other mechanisms can also alter allele frequencies, frequently in ways that counteract the effects of selection. It is essential for a nuanced understanding of evolution that we take into account processes like genetic drift and gene flow as well as the fallacy of presuming that natural selection will always move populations in the direction of their most well-adapted state. The implications of these evolutionary processes are a major concern for conservation geneticists, who model population dynamics of threatened species in fragmented habitats and design reserves while wrestling with these issues.
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Plants grow in two very different ways. Each type of growth is accomplished by specific types of cells, in specific areas of the plant, and for specific purposes. Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Terms may be used once, more than once, or not at all. (1). ____________ is the method by which roots and shoots are elongated in all vascular plants. (2). ___________ is the method by which woody plants grow in thickness. (3). ____________ is accomplished by two cylinders of dividing cells called ________ meristems. (4). _____________ is accomplished by groups of undifferentiated cells at the tips of the roots and shoots called _________ meristems. (5). The majority of growth in width is due to increases in the number of cells added by the _______ cambium. Answer can be complete the following blank 1. Primary Growth 2. Secondary Growth 3. Secondary Growth; Lateral 4. Primary Growth; Apical 5. Vascular
Plants have two distinct ways of growth , each accomplished by specific types of cells in specific areas of the plant and for specific purposes.
Vascular is the method by which roots and shoots are elongated in all vascular plants. (2). Secondary Growth is the method by which woody plants grow in thickness. (3). Primary Growth is accomplished by two cylinders of dividing cells called Apical meristems. (4). Secondary Growth is accomplished by groups of undifferentiated cells at the tips of the roots and shoots called meristems. Lateral (5). The majority of growth in width is due to increases in the number of cells added by the Apical cambium. Primary growth is responsible for elongating the roots and shoots and is carried out by undifferentiated cells at the tips of the roots and shoots called apical meristems. On the other hand, secondary growth is responsible for woody plant's growth in thickness and is accomplished by lateral meristems, which are two cylinders of dividing cells. The majority of growth in width is due to an increase in the number of cells added by the vascular cambium. Understanding the ways in which plants grow and differentiate is critical for the study of plant biology and has important applications in agriculture, forestry, and horticulture.
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Refer Below Image
which factor is a biotic factor of an ecosystem? responses the amount of water vapor present in a rain forest the amount of water vapor present in a rain forest the bacteria that live in the intestine of a rabbit the bacteria that live in the intestine of a rabbit the temperature of water in a stream the temperature of water in a stream the rocks that provide cover for a rattlesnake
The microorganisms that reside in a rabbit's intestine would be the proper response, which is A. The interplay of living and non-living elements in a specific area is referred to as an ecosystem.
The types of creatures that can dwell in an ecosystem and their means of survival can all be significantly influenced by biotic variables including soil bacteria, plant life, top predators, and pollution. A living thing that alters its surroundings is referred to as a biotic factor.A particular ecosystem is the result of the interaction of biotic and abiotic components. A biotic component is another name for a biotic element. Take care not to mix together biotic and abiotic factors.
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some species of animals and plants are currently responding to climate change by extending their range into new territories (True Or False)
This claim is accurate since some species of plants and animals are presently expanding their habitat into new areas in response to climate change.
What kinds of species are examples?The majority of people define biodiversity as a collection of unique living things with the ability to interbreed. Orcas, fair skinned deer, white pine forests, sunflowers, and minuscule germs that are even too small to be seen with the human eye are a few examples of species.
Do we belong to a species?The billions of individuals that currently inhabit the earth are all descendants of one species, Homo sapiens. Human beings differ among themselves, just like other species do, in terms of everything from size and form to skin tone & eye color. However, we are far more similar than we are different.
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in a dna double helix, what kind of chemical bonds form between the complementary nitrogenous bases? in a dna double helix, what kind of chemical bonds form between the complementary nitrogenous bases? nitrogen bonds phosphodiester bonds polar covalent bonds hydrogen bonds
The bond forms between base pairs in DNA to hold the two strands together in a double helix is Hydrogen Bonding.
What is Hydrogen Bonding and Complementary Base Pairing?
Hydrogen bonds are weak bonds that form between a hydrogen atom in one molecule and an electronegative atom in another molecule. Complementary base pairs in a DNA double helix are held together by hydrogen bonds. A and T bases form two hydrogen bonds, while C and G bases form three.
A=T , G ≡ C
The two strands in a DNA double-helix are attached by bonds between complementary bases in the opposite strands. Adenine binds with thymine, and cytosine binds with thymine which is called Complementary Base Pairing.
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next, you perform a cross with a mouse with black fur and a mouse with white fur. which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?
d. 75% of offspring will share their parents' phenotype.
The offspring's results would demonstrate that the mouse with the black fur was heterozygous.
b. Eight mice have black fur, and one has white fur.
c. Five mice have black fur, and six have white fur.
d. Two mice with white fur and six mice with black fur.
When two heterozygotes are crossed, the expected genotype ratio is 1 (homozygous dominant): 2 (heterozygous): 1. (homozygous recessive). The likelihood of a lethal allele increases when a phenotypic ratio of 2:1 is observed.
The total anticipated number of offspring is required to calculate the percentage of offspring. also divide by the (number of phenotypes that appeared) (the total number of offspring). To determine your percentage, multiply the number by 100.
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Complete Question -
In the cross bb x bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
next, you perform a cross with a mouse with black fur and a mouse with white fur. which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?
a. 4 mice with black fur
b. 8 mice with black fur, 1 mouse with white fur
c. 5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur
A bacterium called helicobacter pylori is known to cause gastritis by damaging the mucus layer of the stomach resulting in an ulcer.a. Trueb. False
what are the expected phenotypes of the offspring of a female with dimples and free earlobes (ddff) and a male with no dimples and attached earlobes (ddff)?
The expected phenotypes of the offspring of a female with dimples and free earlobes (ddff) and a male with no dimples and attached earlobes (DdFF) can be determined through a Punnett square, a tool used to predict the genetic outcomes of a cross.
Here is a Punnett square for this cross:
| D | d
--|---|--
f | Df | df
f | Df | df
Each box in the Punnett square represents a possible offspring, and the letters in the boxes indicate the alleles that the offspring has inherited from each parent. The phenotype of the offspring is determined by the dominant and recessive alleles that are present.
In this case, the phenotype for dimples is determined by the dominant allele D and the phenotype for earlobe attachment is determined by the dominant allele F. Therefore, all of the offspring in this cross is expected to have no dimples and attached earlobes (DdFF), which is the phenotype of the male parent.
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the .................. theory states that all life is composed of one or more cells, which are the fundamental units of all life.
The Cell theory states that all the life is composed of one or more then one cells which are the fundamental units of all life.
Cell theory is a abecedarian proposition of biology that states that all organisms are composed of one or further cells, which are the introductory units of life. Cells are the lowest units of life and are the introductory structure blocks for all living effects. This proposition was proposed by two German scientists.
Cell theory is the scientific theory that was first formulated in the mid-nineteenth century, it states that all living organisms are made up of cells, that they are the basic structural/organizational of the unit of all organisms,
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three important things to about photosynthesis
Answer: Carbon Dioxide, Water, Sunlight
Explanation: To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
Answer:
carbondioxide,water and sunlight
Buffers resist abrupt and large changes in the ph of body fluids by releasing or binding ions.a. trueb. false
The given statement "Buffers resist abrupt and large changes in the pH of body fluids by releasing or binding ions" is true because when the pH begins to rise, it binds hydrogen ions to drop pH.
Acid-base balance is maintained in a homeostatic state via chemical mechanisms known as buffers. By releasing hydrogen ions when the pH starts to rise and binding hydrogen ions when the pH starts to fall, buffers prevent abrupt and significant changes in the pH of a solution.
For the body to maintain homeostasis, the pH of body fluids must be generally consistent. Mixtures are physical blendings of different elements or compounds that aren't chemically connected. By releasing or binding ions, buffers protect the body from sudden and significant changes in pH.
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in the transduction of sound, potassium plays an important role. how is it involved? group of answer choices it flows from the endolymph into the hair cell, hyperpolarizing it it causes the release of neurotransmitter onto afferent neurons it is responsible for voltage gated na release it is pumped out of the hair cell by the sodium potassium pump it flows from the endolymph into the hair cell, depolarizing it
In the transduction of sound, potassium plays an important role. It flows from the endolymph into the hair cell, depolarizing it. Thus, the correct option is E.
What is Transduction of sound?
Transduction is the conversion of sound waves to an equivalent electrical waveform. Transduction occurs in the mechanoreceptive hair cells of the ear which are anchored in the organ of Corti. The proximate mechanical stimulus in the cell is deflection of the hair bundles against the overlying acellular tectorial membrane of the organ of Corti.
In the transduction of sound, potassium plays an important role which involves the flow from the endolymph into the hair cells, which results into depolarizing it.
Therefore, the correct option is E.
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