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:

To determine the best answer, we analyze each option:

• Option A: Muscle cell size (affects energy storage and contraction ability), fuel storage (like glycogen for energy during endurance), and blood supply (delivers oxygen and nutrients) are key factors for muscular endurance.
• Option B: "Number of muscles" isn't a direct factor, and "type of person" is too vague.
• Option C: Flexibility is related to range of motion, not directly to muscular endurance.
• Option D: "Type of exercise" is more about training specificity, and while muscle cell type matters, the combination in A is more accurate for factors affecting endurance.

Answer:

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