Question

which statement best describes the factors that affect muscular endurance? a. size of the muscle cells, ability to store fuel, and blood supply to the muscles b. number of muscles, amount of exercise, and type of person c. level of flexibility, amount of exercise, and ability to store fuel d. blood supply to the muscle, type of exercise, and type of muscle cells please select the best answer from the choices provided.

Explanation:

Muscular endurance is related to the size of muscle cells which affects strength - related endurance, the ability to store fuel (such as glycogen) that provides energy for prolonged muscle activity, and blood supply which delivers oxygen and nutrients. Options B's "type of person" is too vague, C's "level of flexibility" is not a direct factor for muscular endurance, and D misses the key factor of ability to store fuel compared to A.

Answer:

A. size of the muscle cells, ability to store fuel, and blood supply to the muscles