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lions [1.4K]
3 years ago
11

An action potential causes the release of neurotransmitters by:________.

Biology
1 answer:
seraphim [82]3 years ago
5 0

Answer:

b) opening calcium pores in the membrane

Explanation:

The opening of calcium  ions channels facilitates the migration of vesicles containing neurotransmitters in the pre-synaptic neurons  to the tip of the post-synaptic membrane. at the <u>neuromuscular  junction </u>These neurotransmitters can either be <u>cholinergic or non-chorlinergic.</u>   <u>At the tip  of the pre-synaptic membranes the vesicles empty their neurotransmitter contents into the synapse.</u>

The neurotransmitters,  diffuse through the neuromuscular junction to bind  with the receptors on the <u>post-synaptic membrane on the post-synaptic neuron.</u> This  stimulates opening of<u> ligand gated sodium ions,</u> and sodium ions  diffuse into the post-synaptic neuronal membrane, to cause <u>depolarization</u>. if the stimulus is  up to the threshold levels   it  generate action potential.

Therefore , more calcium ions channels opening produces; more diffusion of neurotransmitters;leading to opening of more sodium channels for depolarization; and IPSP or EPSP  generation.

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A population of dogs can be either brown or black; the black allele (B) has complete dominance over the brown allele (b). Given
Marat540 [252]

Answer:

The frequency of individuals with the dominant phenotype is 0.83.

Explanation:

We are provided with:

Black allele has completed dominance over brown allele

T. no of dogs (dominant)= 2000

No. of black dogs (dominant) = 1660

From Hardy-weinberg equilibrium

Frequency of individual - (individual/ Total population)

Frequency of black dogs = 1660/2000 =

0.83

So, The frequency of individuals with the dominant phenotype is 0.83

4 0
3 years ago
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maw [93]

Answer;

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Explanation;

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3 years ago
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ddd [48]

Answer:

it might be D.

Explanation:

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A guiding question instead of a hypothesis is most likely used in which of the following?
klemol [59]
The answer is

D. Repeated trials

97% Verified!

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