Chewing
a. breaks food down into smaller pieces.
b. physically and mechanically breaks up the food.
c. increases the surface area of food exposed to
digestive enzymes.
d. mixes some enzymes with the food.
e. does all of these.
Answer: e
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Smooth muscle propels food through the alimentary canal by a process called
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Patients with McArdle's Disease lack an enzyme in their livers that catabolizes glycogen. These individuals tire easily during exercise. Which of the following would best explain this symptom?
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