When venous pressure is too low, ________ stimulate smooth muscles in the walls of veins to contract.

A. carbon dioxide levels
B. parasympathetic reflexes
C. somatic reflexes
D. sympathetic reflexes


Answer: D

Anatomy & Physiology

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Which of the following is not true of triglycerides?

a. A part of the molecule attracts water. b. The molecule contains three fatty acids. c. The molecule contains glycerol. d. Triglycerides are used by the body to store energy.

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Which of the following is a type of protein that defends against viral infections?

a. complement b. interleukin c. cytokines d. interferon e. complement and interferon

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