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QuizMultiple Choice

The Digestive and Excretory Systems

Question 1 • PA Human Anatomy & Physiology A 2026-2027 WHITE IC

Which statement best describes the breakdown of food in the digestive system?

Answer
A
Carbohydrate digestion starts in the stomach and protein digestion starts in the stomach.
B
Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.
C
Carbohydrate digestion starts in the esophagus and protein digestion starts in the small intestine.
D
Carbohydrate digestion starts in the small intestine and protein digestion starts in the esophagus.

Explanation

Carbohydrate digestion begins in the mouth, where salivary amylase starts breaking down starch. Protein digestion begins in the stomach, where acid and enzymes such as pepsin break proteins into smaller pieces. Therefore, the best choice is “Carbohydrate digestion starts in the mouth and protein digestion starts in the stomach.”

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