In the spinal cord, white matter surrounds gray matter.

A nerve that contains only efferent fibers is called a(n)

Myelin wraps around nerve fibers.

The threshold potential for neurons is -55mV.

A nerve that contains only efferent fibers is called a(n)

The threshold potential for neurons is -55mV.

Opening of Na+ gates at the beginning of an action potential is caused by the activation of a receptor.

A neuron that has myelin and a large nerve fiber would transmit a signal faster than a neuron with myelin and a small nerve fiber.

Acetylcholine causes glycogen breakdown in the liver.

The optic nerve provides sensory and motor function.