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.
