Neurotransmitters Are Molecules That Cross the Synaptic Cleft Via

Multiple Choice

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.