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Xavier enjoys playing on his school's basketball team. During a recent practice, he was doing sprints across the basketball court. Having very little rest in between sprints, after the tenth one, Xavier fell to the floor and had trouble standing back up. He felt sharp pains in both legs and felt sick to his stomach. Which of the following molecules was most likely building up in Xavier's leg muscles?

A. Adenine triphosphate
B. Creatine phosphate
C. Hydrochloric acid
D. Lactic acid



Answer :

GinnyAnswer

Final answer:

Lactic acid was building up in Xavier's leg muscles during intense exercise.


Explanation:

Lactic acid was most likely building up in Xavier's leg muscles. During intense exercise, the breakdown of glycogen into pyruvate leads to the production of lactic acid through fermentation, causing fatigue and soreness.


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