The Nervous System

The efferent pathways of the autonomic nervous system consist of the _____ nervous systems.

• peripheral and afferent

• sympathetic and parasympathetic

• sympathetic and efferent

• parasympathetic and somatic

The part of the nervous system that transmits impulses from the CNS to the skeletal muscle is the:

• somatic nervous system.

• autonomic nervous system.

• central nervous system.

• afferent division.

The myelin sheath is formed by:

• Nissl bodies.

• nodes of Ranvier.

• Schwann cells.

• neuron cell bodies.

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

• dendrite, axon, cell body, and receptor.

• dendrite, cell body, and axon.

• axon, cell body, and dendrite.

• receptor, axon, and cell body.

Multipolar neurons have:

• multiple axons and multiple dendrites.

• multiple axons and one dendrite.

• multiple dendrites and one axon.

• one dendrite and one axon.

Nerves that contain mostly afferent fibers are called _____ nerves.

• sensory

• motor

• mixed

• Schwann

Dendrites conduct impulses _____ cell bodies.

• toward

• away from

• within

• None of the above is correct.

Nerves that contain mostly afferent fibers are called _____ nerves.

• sensory

• motor

• mixed

• Schwann

One of the components of the blood-brain barrier is:

• astrocytes.

• neurons.

• myelin.

• oligodendrocytes.

Schwann cells have a function in the PNS that is similar to that of which cells in the CNS?

• Ependymal cells

• Microglia

• Astrocytes

• Oligodendrocytes