Shown in the image below are two neurons, A and B. The synap…
Shown in the image below are two neurons, A and B. The synapse between neuron A and B is excitatory. The yellow action potential in the image occurs in the post-synaptic neuron, B. At the time indicated by the red arrow an action potential arrives at the presynaptic terminal of the pre-synaptic neuron, A. The action potential that occurs in the pre-synaptic neuron (A) at the time of the red arrow is: