Whether a synapse is excitatory or inhibitory depends on the
A) type of neurotransmitter.
B) presynaptic axon terminal.
C) size of the synapse.
D) nature of the postsynaptic receptors.
E) concentration of neurotransmitter in the synaptic space.

Question

Quizplus · Accepted Answer

The nature of the postsynaptic receptors determines whether the synapse is excitatory or inhibitory. Excitatory receptors open ion channels that depolarize the postsynaptic membrane, making it more likely that an action potential will be generated, while inhibitory receptors open ion channels that hyperpolarize the postsynaptic membrane, making it less likely that an action potential will be generated. The other factors listed may have an effect on the overall functioning of the synapse, but they do not determine whether it is excitatory or inhibitory.

Whether a Synapse Is Excitatory or Inhibitory Depends on the