The most significant factor leading to exhaustion during intense endurance exercise lasting 1.5 to 2.5 hours is:
A. depletion of muscle glycogen
B. an increase in lactate production
C. the loss of electrolytes
D. anaerobic glycolysis
Ans: A. depletion of muscle glycogen
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A. vitamin K B. vitamin C C. vitamin A D. vitamin D
Which of the following may result from excessive intake of vitamin A?
a. oxalate stones b. cardiovascular disease c. liver damage d. hypercalcemia e. kidney damage
Severe zinc deficiency _____
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a. 7% b. 18% c. 27% d. 36% e. 45%