Bones of trained athletes may be visibly thicker and heavier than those of nonathletes because

A) athletes have lower blood calcium levels than nonathletes.
B) weight-bearing exercise increases bone mass and strength.
C) nonathletes have a low parathyroid hormone rate.
D) athletes produce more growth plates.
E) nonathletes produce fewer osteoids.


B

Biology & Microbiology

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