SAT Subject Biology Practice Question 282: Answer and Explanation

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Question: 282

12. Structure with the lowest pH

A. Small intestine
B. Large intestine
C. Stomach
D. Esophagus
E. Mouth

Correct Answer: C


C Cells in the stomach secrete hydrochloric acid, which keeps the pH of the stomach around 1-2. The other regions of the digestive tract maintain a fairly neutral pH.

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