During Intense Exercise,as Human Muscle Cells Switch from Respiration to Fermentation,the

Multiple Choice

During intense exercise,as human muscle cells switch from respiration to fermentation,the cells will increase their catabolism of which of the following energy-containing molecules?

A) fats only
B) carbohydrates only
C) proteins only
D) fats,carbohydrates,and proteins
E) fats and proteins only