Question

Which of the following statements is NOT true regarding ATP production in muscles during periods of prolonged energy use, such as exercise?
A. As your blood sugar drops at any time during prolonged activity, glycogen stores in your muscles can be broken down to supply a glucose source.
B. Prolonged activity requires the use of aerobic pathways for ATP regeneration.
C. In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.
D. In the absence of oxygen, anaerobic pathways provide minimal ATP regeneration for less than a minute.

Answer 1

Answer:

C.In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.

Explanation:

C. In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.

This statement  not true for a following reasons.

Firstly,  creatine phosphate directly phosphorylates ATP instead of providing any support for aerobic pathways.

Secondly, creatine phosphate stores are used up in about 15 seconds only. Thirdly, a cell does not need  oxygen deficit for creatine phosphate to be activated, it just needs to be short on ATP.