Synaptic vesicles are small membrane sacs that carry neurotransmitters from the cell body where they are produced, to the presynaptic membrane of the terminal button where they are released. The release zone of the presynaptic membrane contains voltage-dependent calcium channels. When an action potential depolarizes the presynaptic plasma membrane, $Ca^{2+}$ -channels open, and $Ca^{2+}$ flows into the nerve terminal to trigger the exocytosis of synaptic vesicles, thereby releasing their neurotransmitters into the synaptic cleft

3 0

2 years ago

Why is it that scientists have trouble when it comes to RNA viruses?

olchik [2.2K]

RNA viruses can copy themselves which is harder for scientists to give an accurate conclusion to solve them.

8 0

3 years ago