Answers
Answer:
The correct answer will be option-E.
Explanation:
Acetylcholine belongs to a group of chemical messengers which also acts as neurotransmitters in the synaptic transmission of the signals.
The acetylcholine is present in the vesicles in the synaptic knob which when released at the neuromuscular junction cause the contraction of the skeletal muscle along with cardiac and smooth muscle.
The mechanism of action is different in different muscles as the neurotransmitter binds to the nicotinic receptors present on the motor endplate and opens ligand-gated sodium channels.
In smooth and cardiac muscle it binds to the muscarinic receptors and cause the release of calcium ions and potassium ions respectively and cause muscle contraction.
Thus, option-E is the correct answer.
Related Questions
Which of the following industries has not seen an increase in hazardous waste production?
Describe what will occur the population if it increases in number when food is scarce?
What occurs when people are exposed to substances that their bodies are sensitive to? histaminesallergiesantihistaminesallergens
Which part of the leaf most likely produces the most glucose•the green part, because it contains the chlorophyll •the white part, because it contains the chlorophyll •the green part, because it contains carbon dioxide •the white part, because it contains carbon dioxide
Answers
OA. It only maintains the cell shape.
ОВ.
It removes waste and stores ingested food.
OC. It generates energy for the cell.
OD.
It controls the entry and exit of substances.
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Answers
Answer:
D. It controls the entry and exit of substances.
Explanation:
The cell membrane provides protection for the cell, transporting nutrients in and carrying toxic substances out.
B.they are not cells
C.they do not contain chromosomes
D.all of the above
Answers
B. Red headed females in a population will only breed with red headed males. The yellow headed females will only breed with yellow headed males. The red and yellow populations live on separate continents and rarely met in nature. The red and yellow could breed and produce fertile offspring but they normally do not. This would be an example of sympatric speciation.
C. Sympatric speciation does not require geographic isolation.
D. Red headed females in a population will only breed with red headed males. The yellow headed females will only breed with yellow headed males. This population lives in the same geographic area. The red and yellow individuals could breed and produce fertile offspring but they normally do not. This would be an example of sympatric speciation.
E. Sympatric speciation can be due to sexual(mate) selection
Answers
Answer: Options A, C and E are correct
A) Sympatric speciation is best described as a random event that disrupts the allele frequencies in a population
C) Sympatric speciation does not require geographic isolation.
E) Sympatric speciation can be due to sexual(mate) selection
Explanation:
Sympatric speciation is the situation whereby organisms of the same species:
- live in the same territory or nearby territories ( i.e not living in isolation)
- DO NOT interbreed, but select a sexual mate from a much diverse territory which results in an uneven gene flow or disruption of alleles in new species or offsprings of such parents organisms.
2. Can a bird have a house?
3. Can a bird have a truck?
Answers
2. No, a bird cannot have a house in the sense that humans do. Birds typically create nests or use natural shelter, like tree cavities, for their homes.
3. No, a bird cannot have a truck. Birds do not possess the physical or cognitive ability to own or operate vehicles like trucks.
Answers
Threonine contains two functionalgroups: an amino group (-) and a hydroxyl group (-OH).
These functionalgroups are responsible for the molecule's properties and reactivity. The amino group is part of the amino acid structure, while the hydroxyl group is characteristic of alcohols.
The carboxyl group (-COOH) is another functionalgroup present in threonine. It is acidic in nature and can donate a proton, making threonine capable of acting as a weak acid.
The hydroxyl group (-OH) attached to the side chain of threonine is an alcohol functional group. It provides threonine with unique chemical properties.
Thus, threonine contains two distinct functional groups: an amino group (-) and a hydroxyl group (-OH).
For more details regarding functional group, visit:
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Answer:
It contains Amino group NH2, Carboxylic Acid group COOH, also Hyroxyl group OH