Nerve impulses

A. False In axons, impulses travel in both directions from a point of electrical stimulation.

B. True The transmitter vesicles are in the pre-synaptic terminal.

C. False Impulse propagation is a different process and much slower than electrical current.

D. True Nerves cannot be re-excited while their membrane polarity is reversed.

E. False The shorter refractory periods in somatic nerves allow higher frequencies.