When a runner or other long-distance athlete hits the "wall," the individual is experiencing oxygen debt in muscle cells. In those cells, the pyruvate generated in glycolysis would be expected to be converted to
A) fat.
B) lactic acid.
C) glucose.
D) carbon dioxide.
E) water.

Question

Quizplus · Accepted Answer

When oxygen is scarce, such as during intense exercise, pyruvate is converted to lactic acid in muscle cells to regenerate NAD+, allowing glycolysis to continue producing ATP anaerobically.

When a Runner or Other Long-Distance Athlete Hits the "Wall