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.

Muscles and glands that respond to nerve stimulation are called _________.

In the spinal cord, white matter surrounds gray matter.

Which of the following would be a characteristic of a neuron with the fastest conduction speed?

Myelin is formed by Oligodendrocytes in the PNS and Schwann cells in the CNS.

The coughing, gagging, swallowing and vomiting reflexes are located in the

The central sulcus is the groove between the

The cerebrum exhibits folds (ridges) called ________ separated by grooves called ________ .

The coughing, gagging, swallowing and vomiting reflexes are located in the

The location of cranial nerves III through IV is the