AP Biologymediummcq1 pt
What is the primary reason for the buildup of lactic acid during intense muscle activity?
A.C) Reduced concentration of NAD+
B.D) All of the above
C.A) Inadequate oxygen supply
D.B) Increased demand for ATP
Explanation
Core Concept
The buildup of lactic acid during intense muscle activity is primarily due to a combination of factors. Inadequate oxygen supply results in anaerobic conditions, which allow for the conversion of pyruvate to lactate. Increased demand for ATP necessitates anaerobic metabolism, and reduced concentration of NAD+ forces the conversion of pyruvate to lactate.
Correct Answer
D
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