Exam 18: Nervous System Cells

Multiple sclerosis is the most common primary disease of the CNS.

Gray matter in the brain and spinal cord consists primarily of:

Microglia are associated with the formation of the blood-brain barrier.

Interneurons reside in the:

Along a neuron, the correct pathway for impulse conduction is:

Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have:

Like other cells of the nervous system, glia cells have lost their capacity for cell division.

The word glia means "support," which accurately describes their function in the nervous system.

Damage to a single neuron can have a "domino" effect causing the shutdown of an entire nerve pathway.

When "central" and "peripheral" are used as directional terms in the nervous system, a nerve fiber may be called peripheral if it extends from the cell body toward the CNS.

If there were lesions on a bundle of myelinated fibers, what would occur?

Match each term with its definition or description. -Fatty sheath around nerve fibers made by Schwann cells

Match each of the following cell types with its corresponding description. -Has the capability of phagocytosis

Nerve fibers with many Schwann cells forming a thick myelin sheath are called myelinated fibers, or gray fibers.

The endoneurium is deep to the epineurium.

Which of the following compounds cannot cross the blood-brain barrier?

The nervous system is designed to detect stimuli from both the internal and external environment.

Neurons in the CNS have less chance of regenerating for all of the following reasons except:

Dendrites have many synaptic knobs so they can receive impulses from several other neurons at the same time.

Regeneration of nerve fibers will occur only if the cell body is intact and the fibers have a neurilemma.