Why are elderly people vulnerable to hypothermia?
A. They produce fewer keratinocytes.
B. They produce less keratin.
C. They produce less melanin.
D. They have less blood circulating through their skin.
E. Their skin is more wrinkled.
D. They have less blood circulating through their skin.
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Which of the following is NOT one of the body's physiological chemical buffering systems?
A) bicarbonate B) hydrochloride C) phosphate D) Hydrochloride, bicarbonate and phosphate are all buffering systems
An action potential
A) lasts for 1-2 minutes. B) propagates along the actin myofilaments. C) is all or none. D) is always below threshold.
Medications known as anticoagulants interfere with:
A) platelet aggregation. B) vascular spasms. C) the coagulation cascade. D) platelet activation.
A herniated disk is
A. a hole in a flat muscular wall. B. a knee injury that may require surgery. C. a rupture of fibrocartilage in the spine. D. a dislocation of the pubic symphysis.