試題詳解

28. It is correct to say that neural transmission across mammalian synaptic clefts is the result of
(A) neural impulses involving the flow of and across the cleft.
(B) neural impulses traveling across the gap as electrical currents.
(C) neural impulses causing the release of chemicals that diffuse across the cleft.
(D) neural impulses traveling across the cleft in both directions.
(E) the calcium within the axons and dendrites of nerves adjacent to a synapse acting as the neurotransmitter.