Arterioles to this organ do not normally show vasoconstriction:
a. skeletal muscles.
b. heart.
c. skin.
d. brain.
e. kidney
D
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What normally stops hormone action, and why is this important?
What will be an ideal response?
The main advantage of antagonistic control of visceral organs by the sympathetic and parasympathetic nervous systems is it
a. saves energy. b. economizes on volume requirements since organs can constrict when they're not being used. c. allows precise regulation of the activity of the organs so innervated. d. all of these. e. none of these.
In this experiment, which part of the body showed the smallest 2-point threshold?
A. Palm of the hand B. The back of the neck C. The leg D. The forearm E. Fingertip
Veins ________
A) carry blood away from the heart B) branch into smaller vessels called arterioles C) transport oxygen-rich blood D) operate under high pressure E) often have valves to prevent the backflow of blood