Question 14
Choose the best answer
What happens after an action potential reaches the axon terminal?

A. The impulse changes its charge in the synapse
B Vesicles release neurotransmitters into the synapse.
C
Na+ and K+ ions rush into the synapse
D Neurotransmitters are broken down in the synapse

is A.

Explanation:

When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated Na+ channels. Na+ ions enter the cell, further depolarizing the presynaptic membrane. ... Fusion of a vesicle with the presynaptic membrane causes neurotransmitters to be released into the synaptic cleft.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs