George plays basketball for his high school team, and he is concerned that he is not consumingenough kilocalories to support his activity. Which of the following would be the MOST likelyindicator that he is not consuming adequate kilocalories?

A) low blood glucose levels

B) weight loss

C) impaired performance on the court

D) low hemoglobin

Weight loss

Explanation:

The energy is provided to the organism through many metabolic reactions the most common of which is cellular respiration. The cellular respiration produces energy in the form of ATP molecules which is counted in by the humans in the form of calories as 1 ATP produces about 7.3 calories per mol.

The most favoured substrate of respiration is glucose which if not present is substituted by proteins and glycogen. When the body uses substrate other than the glucose than the body experiences loss in the weight.

Thus, weight loss is the correct answer.