The primary motor cortex is part of the frontal lobe.

Myelin wraps around nerve fibers.

Action potentials only occur on nerve fibers.

Nerve fibers are insulated from one another by ________.

Polio is a disease that causes destruction of oligodendrocytes.

___________ is a disease characterized by a deficiency of acetylcholine and brain atrophy.

Three pairs of cranial nerves control eye movement but only one pair transmits the signal for sense of vision.

The location of cranial nerves III through IV is the

The bundle of nerve roots that resemble a horse’s tail and occupy the vertebral canal from L2 to S5 is called the ________.

What is the correct sequence of events along an axon that follows a membrane reaching threshold potential?1. The membrane depolarizes.2. Sodium channels open and sodium ions diffuse inward.3. The membrane repolarizes.4. Potassium channels open and potassium ions diffuse outward.