Sarah is a sprinter who specializes in quick and powerful bursts of speed followed by periods of rest. Priya is a marathon runner who specializes in long, steady runs. Compared to Priya, Sarah is likely to have
A. leg muscles with a larger diameter.
B. leg muscles with a smaller diameter.
C. lower concentrations of glycolytic enzymes in her leg muscles.
D. hypertrophy of type I muscle fibers.
E. a higher density of capillaries in her leg muscles.
Answer: A
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