When a drug is taken orally, the rate at which its molecules are absorbed from the digestive tract into the bloodstream is likely to be affected by
a. the pH of the drug.
b. the pH of the contents of the digestive tract.
c. the presence of food in the stomach.
d. how quickly the drug moves out of the stomach and into the intestine.
e. all of the above factors affect the rate of drug absorption.
Answer: E
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