A friend lifts weights for several months, and his muscles visibly increase in size. He also has calluses on his palms from the barbells. The increase in muscle size is due to ________, while the calluses are due to ________.

A. hypertrophy; atrophy
B. hypertrophy; hyperplasia
C. dysplasia; hypertrophy
D. anaplasia; hyperplasia


Answer: B

Anatomy & Physiology

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