Select the correct statement regarding skin functions.
A. When body temperature is higher than normal, blood flow to the skin is increased.
B. Aging is usually associated with increased melanin production.
C. The primary function of perspiration is to remove waste materials from the blood.
D. A decrease in blood flow to the skin is associated with a feeling of warmth.
Answer: A
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Compared with the pectoral girdle, the pelvic girdle is
A) not as firmly anchored to the axial skeleton. B) comprised of more massive bones, which are adapted for weight bearing. C) composed of more separate bones. D) more flexible and freely movable. E) structurally identical.
What is the term for macrophages that have migrated to the skin?
A. Alveolar macrophages B. Mast cells C. Microglia D. Dendritic cells E. Megaphagocytic cells
Breathing air through the nose provides multiple functions. What function would be most impacted while breathing dry air?
A. Warming of the air B. Delivering the air to the lungs C. Providing a resonance chamber for speech D. Humidifying the air
Multiunit smooth muscle cells
A. generally have individual innervation of each cell. B. have many gap junctions between cells. C. respond to stretch by relaxing. D. can only be excited, and not inhibited. E. have abundant T-tubules.