Question

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

Answer 1

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.

The neurotransmitters,  diffuse through the neuromuscular junction to bind  with the receptors on the post-synaptic membrane on the post-synaptic neuron. This  stimulates opening of ligand gated sodium ions, and sodium ions  diffuse into the post-synaptic neuronal membrane, to cause depolarization. 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.