What happens as a result of ion flow at a presynaptic terminal?

Synaptic vesicles migrate to the plasma membrane and release acetylcholine.
Acetylcholine is passively transported from the presynaptic neuron.
Acetylcholine is actively transported to the postsynaptic neuron.
Ligand-gated sodium channels open.
Sodium ions diffuse into the cell.

Respuesta :

The correct answer is: Synaptic vesicles migrate to the plasma membrane and release acetylcholine.

Action potential travels through the membrane of the presynaptic cell causing the channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine), Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells.