Which of the following is NOT true of antibodies?
A. They are a Y-shaped protein molecule.
B. There are five classes of antibodies.
C. Antibodies can act by neutralization.
D. They have a constant region that binds to an antigen.
Answer: D
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Filtration of the blood takes place in which organ?
A. Kidney B. Heart C. Lungs D. Stomach
The volume entering or leaving the lungs during a single breath is called the
a. tidal volume. b. expiratory reserve volume. c. inspiratory reserve volume. d. residual volume. e. inspiratory capacity.
When the stimulus intensity increases, ______
A) the number of action potentials increases B) the size of the action potential increases C) the size of the action potential decreases D) the number of action potentials decreases
What helps complete lipid digestion by emulsifying fats?
A. Lipase B. Bile C. Mucus D. None of these are correct.