The operation of a synapse
A)results from the passage of an electrical charge across the gap.
B)involves a transmitter substance from vesicles in the presynaptic neuron that act upon receptor sites on the postsynaptic neuron.
C)occurs only between two nerves.
D)is limited only by the action of acetylcholinesterase.
E)involves transduction of the electrochemical energy of an action potential into mechanical energy of movement.

Question

Quizplus · Accepted Answer

The operation of a synapse involves the release of a transmitter substance from vesicles in the presynaptic neuron that acts upon receptor sites on the postsynaptic neuron. This results in a chemical signal being transmitted across the synaptic gap, rather than an electrical charge. The action of acetylcholinesterase is one way in which the effects of the transmitter substance are limited, but it is not the only mechanism involved. Synapses can occur between neurons, between neurons and muscle cells, or between neurons and glands, so they are not limited to communication between nerves. Finally, transduction of energy is not directly involved in the operation of a synapse.

The Operation of a Synapse