Which statement regarding exercise is true?
A) Most of the ATP for aerobic exercise comes from aerobic respiration.
B) During a short burst of activity such as a sprint, the main source of energy is aerobic respiration.
C) If the demand for ATP outstrips oxygen supply, muscles switch to aerobic fermentation.

Question

Quizplus · Accepted Answer

Aerobic exercise, such as jogging or cycling, relies primarily on aerobic respiration to produce ATP. This form of respiration uses oxygen to break down glucose and produce ATP, which can fuel sustained activity.

Note: Option B is incorrect because short bursts of activity, such as sprints, rely primarily on anaerobic respiration to produce ATP. This form of respiration does not use oxygen and instead breaks down glucose to produce ATP quickly but at the expense of creating lactic acid as a byproduct. Option C is also incorrect because aerobic fermentation does not exist; it may be referencing anaerobic fermentation, which occurs when there is an insufficient oxygen supply for aerobic respiration. However, this is generally a less efficient way to produce ATP and can only fuel short bursts of activity.

Which Statement Regarding Exercise Is True