A weightlifter uses muscles so the muscles exert more than 75% of their maximum tension. This stimulates
A)an increase in slow, fatigable white fibers.
B)muscle fibers developing new filaments of actin and myosin.
C)shrinking of skeletal muscle.
D)conversion of skeletal to smooth muscle.

Question

Quizplus · Accepted Answer

When a weightlifter uses muscles and exerts more than 75% of their maximum tension, it stimulates muscle fibers to undergo hypertrophy, meaning they develop new filaments of actin and myosin, resulting in increased strength and size of the muscles. This process does not involve an increase in slow, fatigable white fibers, shrinking of skeletal muscle, or conversion of skeletal to smooth muscle.

A Weightlifter Uses Muscles So the Muscles Exert More Than