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In which two locations does gas exchange take place?
The alveoli and the capillaries
What forms must carbohydrates and proteins be in to be absorbed by the small intestine?
monosaccharides and aino acids
Secretions from the _____, called _____, neutralize acid from the stomach in the small intestine.
pancreas, bicarbonate
the muscular valve at the bottom of the stomach that controls the flow of partially digested food into the small intestine is known as
pyloric sphincter
What do amylase and pepsin have in common?
they are both digestive enzymes
Which of the following does the large intestine most likely absorb in digestion?
water
an inactive precursor of an enzyme that must go through a changed to be activated
zymogen
