A person’s pulse rate generally goes down while sleeping. One reason for this cause is

2 answers:

8 0

When a person is not being physically active, like during sleep, the heart rate goes down because you're are not doing anything that requires more oxygen.

Vesnalui [34]3 years ago

6 0

Because the sympathetic nervous system is no longer active following strenuous exercise.

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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 neuromuscular junction These neurotransmitters can either be cholinergic or non-chorlinergic. At the tip of the pre-synaptic membranes the vesicles empty their neurotransmitter contents into the synapse.

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