Generation of an Action Potential at an Axon of a Neuron

Multiple Choice

Generation of an action potential at an axon of a neuron may be caused by

A) stimulation of any portion of the dendrites of the neuron.
B) input from various presynaptic cells.
C) a change in the number of Schwann cells surrounding the axon.
D) stimulation of any portion of the dendrites of the neuron and/or input from various presynaptic cells.
E) All of the answers are correct.