(Solution Document) Which of the following offers the best description of neural transmission across

Which of the following offers the best description of neural transmission across a mammalian synaptic gap such as from motor neuron to muscle?

a. The calcium within the axons and dendrites of nerves adjacent to a synapse acts as the neurotransmitter.

b. Neural impulses typically travel across the gap in both directions.

c. Neural impulses involve the flow of K+ and Na+ across the gap.

d. Neural impulses travel across the gap as electrical currents.

e. Neural impulses cause the release of chemicals that diffuse across the gap.