Nervous System Exam PreAP

Front

What are microglia?

Back

Microglia are the supporting cells of the nervous system that act as the main form of immune defense in the central nervous system.

Front

What are the deep grooves in the brain called?

Back

Fissures.

Front

What is a nerve impulse?

Back

An electrical charge that travels along a nerve fiber when stimulated.

Front

What factors affect the speed of nerve impulse transmission?

Back

Factors include the presence of myelin sheath and the diameter of the axon.

Front

Which of the following is not a part of a neuron: axon, dendrite, cell body, or microglia?

Back

Microglia are supporting cells, not part of a neuron.

Front

What is the function of ependymal cells?

Back

Ependymal cells line the ventricles of the brain and produce cerebrospinal fluid.

Front

What are astrocytes?

Back

Astrocytes are star-shaped glial cells in the brain and spinal cord that support neurons and maintain the blood-brain barrier.

Front

What is the role of oligodendrocytes?

Back

Oligodendrocytes are responsible for forming the myelin sheath around axons in the central nervous system.

Front

What are the main parts of a neuron?

Back

The main parts of a neuron are the cell body, dendrites, and axon.

Front

What is the difference between gray matter and white matter?

Back

Gray matter contains neuron cell bodies, while white matter contains myelinated axons.