Neurotransmitters are molecules that cross the synaptic cleft via
A) active transport and always inhibit the postsynaptic neuron.
B) active transport and always excite the postsynaptic neuron.
C) passive diffusion and either excite or inhibit the postsynaptic neuron.
D) passive diffusion and always inhibit the postsynaptic neuron.
E) passive diffusion and always excite the postsynaptic neuron.

Question

Quizplus · Accepted Answer

Neurotransmitters cross the synaptic cleft via passive diffusion, meaning they move from an area of high concentration (synaptic vesicles) to an area of low concentration (postsynaptic membrane). They can either excite or inhibit the postsynaptic neuron, depending on the neurotransmitter and the receptor it binds to. Therefore, option C is the best choice as it correctly describes how neurotransmitters work.

Neurotransmitters Are Molecules That Cross the Synaptic Cleft Via