12 Study Guide

One function of the somatic nervous system that is not performed by the autonomic nervous system is conduction of impulses:
A. to involuntary muscles and glands.
B. to skeletal muscles.
C. to the central nervous system.
D. between the brain and spinal cord.

A neuron with a single dendrite at one end of the cell body and a single axon at the other end of the cell body would be classified as:
A. bipolar.
B. multipolar.
C. monopolar.
D. unipolar.

Neurons that carry impulses away from the CNS are called:
A. sensory neurons.
B. association neurons.
C. efferent neurons.
D. afferent neurons.

Schwann cell
A. is the outer, nucleated layer of a certain cell type
B. conducts impulses to cell body
C. covers neuron fibers
D. produces myelin sheath
E. carried impulses away from the perikaryon

Dendrite
a. is the outer, nucleated layer of a certain cell type
b. produces myelin sheath
c. carried impulses away from the perikaryon
d. covers neuron fibers
e. conducts impulses to cell body

Neurons are specialized for the conduction of impulses, where as neuroglia:
A. support nerve tissue.
B. serve as motor end plates.
C. synthesize acetylcholine and cholinesterase.
D. All of the above are correct.

There is one-way conduction at a synapse because:
A. only postsynaptic neurons contain synaptic vesicles.
B. acetylcholine prevents nerve impulses from traveling in both directions.
C. only the presynaptic neuron contains neurotransmitters.
D. only dendrites release neurotransmitters.

Which contains the thalamus and hypothalamus?
A. brainstem
B. cerebrum
C. medulla oblongata
D. diencephalon

The reticular activating system:
A. affects the positioning of the head to improve hearing.
B. maintains wakefulness.
C. programs for fine repetitive motor movements.
D. maintains constant internal environment.

Which phrases best describe the spinal cord? (More than one answer may be correct)
A. conducts sensory impulses to the brain
B. descends inferior to the lumbar vertebrae
C. descends to the fourth lumbar vertebra
D. conducts motor impulses from the brain

Sensory neuron
A. is stimulated by one neuron and passes impulse on to another neuron
B. carries impulses to the CNS
C. carries impulses to a responding organ
D. responds to motor impulse
E. responds directly to changes in environment

Effector
a. carries impulses to the CNS
b. carries impulses to a responding organ
c. responds to motor impulse
d. is stimulated by one neuron and passes impulse on to another neuron
e. responds directly to changes in environment

Which is not a protective covering of the CNS?
A. dura mater
B. arachnoid
C. cauda equine
D. cranial bone

The composition of cerebrospinal fluid is:
A. a plasma-like liquid with glucose, salts, and proteins
B. distilled H₂O with dissolved salts.
C. a heavy mucous solution with dissolved salts, glucose, and urea.
D. the same as blood.

Tasting
A. facial
B. optic
C. olfactory
D. hypoglossal
E. vestibulocochlear

Balance maintenance
a. facial
b. olfactory
c. vestibulocochlear
d. hypoglossal
e. optic

An autonomic ganglion can be described as:
A. the site of synapses between visceral efferent neurons.
B. a point of synapse between parasympathetic and sympathetic neurons.
C. a site where spinal reflexes occur.
D. the place where unconscious sensations occur.

The sympathetic division of the autonomic nervous system:
A. mobilizes energy in times of need.
B. is innervated by cell bodies from T1 through L2.
C. is innervated by cell bodies located in the cranial nerve nuclei.
D. Both a and b are correct.
E. Both a and c are correct.

The parasympathetic division of the autonomic nervous system:
A. conserves and stores energy.
B. has relatively short postganglionic neurons.
C. Both a and b are correct.
D. has paravertebral ganglia.

More extensive use of norepinephrine as a transmitter substance
a. sympathetic
b. parasympathetic

More widespread and generalized effects
a. sympathetic
b. parasympathetic

Elicits rest-response
a. sympathetic
b. parasympathetic

Breathing passageways
A. decreases diameter
B. decreases activity
C. increases activity
D. increases diameter

Intestines
a. increases diameter
b. decreases diameter
c. increases activity
d. decreases activity

Liver
a. increases diameter
b. decreases diameter
c. increases activity
d. decreases activity