Voltage- Gated Calcium Channels in the Axon Terminal Open in Response

Multiple Choice

Voltage- gated calcium channels in the axon terminal open in response to which of the following?

A) initiation of an action potential in the axon hillock
B) arrival of an action potential at the axon terminal
C) neurotransmitter binding to receptor
D) paracrines released from the post- synaptic cell
E) summation of graded potentials at the axon hillock