What happens when an action potential arrives at an axon terminal?
A) Membrane voltages stimulate the axon.
B) The action potential starts a chain reaction.
C) A neurotransmitter builds up so it can be used again.
D) The action potential causes an influx of phosphorous ions.
E) Chemicals relay the message at a synapse.

Question

What happens when an action potential arrives at an axon terminal?​
A) ​Membrane voltages stimulate the axon.
B) ​The action potential starts a chain reaction.
C) ​A neurotransmitter builds up so it can be used again.
D) ​The action potential causes an influx of phosphorous ions.
E) ​Chemicals relay the message at a synapse.

Quizplus · Accepted Answer

When an action potential arrives at an axon terminal, chemicals called neurotransmitters are released from vesicles into the synaptic cleft, the small gap between the axon terminal and the receiving neuron or other target cell. These neurotransmitters bind to receptors on the target cell and relay the message to continue the electrical signal or to inhibit it.

What Happens When an Action Potential Arrives at an Axon