In very high-intensity exercise, lasting only one or two minutes, the probable cause of fatigue is ________.
A. disruption of cellular metabolism caused by the accumulation of hydrogen ions
B. a depletion of carbohydrate stores
C. loss of lipid reserves
D. a depletion of phosphocreatine
Answer: A
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A) Adequacy B) Balance C) Moderation D) Variety E) All of the above
Mechanical digestion begins in the
A) large intestine. B) small intestine. C) mouth. D) stomach.
A factor during infancy that may decrease the risk of obesity during childhood and adolescence is:
a. feeding on demand. b. feeding on a schedule. c. exclusive bottle feeding. d. exclusive breastfeeding.
Why might someone who eats a diet that contains inadequate amounts of niacin and riboflavin experience fatigue and feel tired?