Ganong's Review of Medical Physiology, 23rd Edition

172 SECTION III Central & Peripheral Neurophysiology
MULTIPLE-CHOICE QUESTIONS
For all questions, select the single best answer unless otherwise directed.
1. The distance by which two touch stimuli must be separated to be
perceived as two separate stimuli is greatest on the
A) lips.
B) palm of the hand.
C) back of the scapula.
D) dorsum of the hand.
E) tips of the fingers.
2. Visceral pain
A) shows relatively rapid adaptation.
B) is mediated by B fibers in the dorsal roots of the spinal
nerves.
C) is poorly localized.
D) resembles "fast pain" produced by noxious stimulation of the
skin.
E) causes relaxation of nearby skeletal muscles.
3. Nociceptors
A) are activated by strong pressure, severe cold, severe heat, and
chemicals.
B) are absent in visceral organs.
C) are specialized structures located in the skin and joints.
D) are innervated by group II afferents.
E) all of the above
4. Thermoreceptors
A) are activated only by severe cold or severe heat.
B) are located on superficial layers of the skin.
C) are a subtype of nociceptors.
D) are on dendritic endings of Aδ fibers and C fibers.
E) all of the above
CHAPTER RESOURCES
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