Question

a common cause of muscle atrophy is:

a. overusing muscles

b. an infection

c. prolonged bed rest

d. range-of-motion exercises

Explanation:

Muscle atrophy is the loss of muscle mass and strength. Overusing muscles and range-of-motion exercises typically maintain or build muscle, not cause atrophy. While infections can sometimes contribute indirectly, prolonged bed rest leads to disuse, which is a very common direct cause of muscle atrophy as muscles are not being activated regularly.

Answer:

c. Prolonged bed rest