A Synapse Includes

Question

A synapse includes
A) a very narrow synaptic cleft
B) a presynaptic neuron with neurotransmitter receptor sites on its membrane
C) a postsynaptic neuron that releases the neurotransmitter
D) all of the above

Accepted Answer

A synapse includes a very narrow synaptic cleft, which separates the presynaptic neuron with the neurotransmitter from the postsynaptic neuron with the receptor sites. However, the statement in option B that the presynaptic neuron has receptor sites on its membrane is incorrect, as it is the postsynaptic neuron that has the receptor sites. Option C is also incorrect, as the postsynaptic neuron receives the neurotransmitter, rather than releasing it. Therefore, only option A is the best choice.