Question

You have discovered a new animal and have decided to test its muscle physiology during exercise. While exercising the animal, you continually assay the blood and muscle chemistry. Your assays demonstrate that blood glucose levels drop dramatically and remain low throughout the whole exercise period. Additionally, you find that the muscle fibers exhaust their glycogen stores and that there is little to no glucose or lactate found within the cells. However, ATP levels within the cell are normal. Which of the following can you conclude regarding this animal's ability to maintain muscle activity during exercise?a. The animal only uses fats for muscle metabolism within the cell in order to produce ATP.b. The animal only utilizes anaerobic metabolism for the production of ATP.c. The intestinal transport of glucose in these animals must be extraordinarily high.d. The animal produces an excessive amount of lactic acid that is delivered to the liver for gluconeogenesis.

Answer 1

B) The animal only uses fats for muscle metabolism within the cell in order to produce ATP.