Exam 18: Nervous System Cells

The CNS is composed of efferent nerves only.

Match each term with its definition or description. -Microscopic gaps in the myelin sheath

In an ipsilateral arc, the effectors and receptors are on opposite sides of the body.

What type of neuron is always a sensory receptor?

Only astrocytes, microglia, and oligodendrocytes are found in the CNS; Schwann cells and ependymal cells are found in the PNS.

Preparing the body for "fight or flight" describes the function of the _____ nervous system.

Which of the following structures is(are) not found on the axon?

The microglia engulf and destroy microorganisms and cellular debris.

Most of the neurons in the brain and spinal cord are unipolar.

Match each part of the nervous system with its corresponding description. -Produces the "fight-or-flight" response

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 away from the CNS.

Most nerves in the human nervous system are mixed.

Bipolar and multipolar are examples of the structural classification of neurons.

Oligodendrocytes form myelin sheaths around nerve fibers in the CNS.

Sue was in a severe car accident. She had injuries to her arm and lower spinal column. Her physician told her that she most likely would regain the use of her arm but her legs would be paralyzed. Why did he say that? Explain the differences in the neuron structures.

Match each of the following cell types with its corresponding description. -Produces the myelin sheath around nerve fibers in the CNS

The white matter of the nervous system is made up of: