Helper T cells ________
A) function in the adaptive immune system activation
B) often function to decrease the immune response
C) bind tightly to target cells and release a lymphotoxin called perforin
D) release B7 proteins
A
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A glucose molecule is broken down into two pyruvic acid molecules in
A) gluconeogenesis. B) the electron transport system. C) glycolysis. D) the citric acid cycle.
The volume of air inspired or expired with each breath is the ________.
A. tidal volume B. expiratory reserve volume C. residual volume D. inspiratory reserve volume
Substances used to measure renal clearance should be:
A) secreted but neither filtered nor reabsorbed. B) filtered, reabsorbed, and secreted. C) completely filtered but neither reabsorbed nor secreted. D) filtered and reabsorbed, but not secreted.
How is the length of a skeletal muscle cell related to the force it can generate?
A. The tension in a skeletal muscle cell is greatest when contractions occur at either very short or very long lengths. B. Skeletal muscle cells generate the same amount of force, regardless of their length. C. The shorter a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. D. The longer a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. E. Skeletal muscle cells generate the most force when the contraction occurs at an intermediate length.