Question

smartart video: atp
1 part -- of 1 point
which of the following is a way that muscle fibers get energy needed for contraction?
during moderate exercise, such as jogging on the treadmill, pyruvate and hydrogen ions accumulate causing muscle fatigue.
during peak activity levels, glycolysis is the only pathway by which atp can be produced to supply energy to the muscle.
because energy demands are low in a resting muscle, a resting muscle is able to meet its atp requirement through glycolysis.
aerobic exercise is beneficial to a muscle because it increases the muscles ability to acquire greater amounts of glucose from the blood for atp production.
when a muscle is contracting during peak activity, it quickly uses up stored creatine phosphate which was produced during moderate exercise.

Explanation:

1. The first option describes muscle fatigue rather than energy - getting process.
2. During peak activity, there are multiple ways to produce ATP like creatine - phosphate breakdown in addition to glycolysis, so the second option is incorrect.
3. A resting muscle meets its ATP requirements mainly through aerobic respiration, not glycolysis, so the third option is wrong.
4. Aerobic exercise improves the muscle's ability to take up glucose from the blood for ATP production, which is a way muscle fibers get energy.
5. Creatine phosphate is used during short - term, high - intensity activities, but the description about its production and usage in the fifth option is not the main way of getting energy for contraction.

Answer:

Aerobic exercise is beneficial to a muscle because it increases the muscle's ability to acquire greater amounts of glucose from the blood for ATP production.