A synapse is

Communication across a synapse usually involves the release of

The gray matter of the spinal cord:

The withdrawal, or flexor, reflex is one of the only voluntary reflexes.

Which of these glial cells can form a myelin sheath around axon fibers in the central nervous system?

The most abundant class of neuron in the central nervous system is

After suffering a blow to the back of the head, Phil loses his vision. The blow probably caused damage to the

The surface of the postcentral gyrus contains the ________ cortex.

Dendrites release neurotransmitters into the extracellular space during nerve impulse transmissions.

________ centers receive information from many association areas and direct extremely complex motor activities such as speech.