ATI LPN
Gastrointestinal System Questions and Answers Questions
Question 1 of 5
What is the most definitive diagnostic test for peptic ulcer disease?
Correct Answer: B
Rationale: Endoscopy with biopsy is the most definitive test for PUD, allowing visualization of ulcers and testing for H. pylori, a common cause. Barium swallow can detect ulcers but is less specific. CT scan is used for complications like perforation, not primary diagnosis. Fecal occult blood detects bleeding but not the ulcer itself.
Question 2 of 5
The enzyme pepsin is produced in the cells of the stomach but not in the cells of the small intestine. The small intestine produces a different enzyme, trypsin. The reason that the stomach and small intestine produce different enzymes is that the gene that codes for pepsin is
Correct Answer: B
Rationale: All cells have the same genes, but pepsin's gene is expressed (active) in stomach cells, not small intestine cells, due to tissue-specific regulation. It's not absent , mutated , or digested .
Question 3 of 5
Where does the partly-digested food (in liquid form) go after it leaves the stomach?
Correct Answer: C
Rationale: Partly-digested food (chyme) moves from the stomach to the small intestine for further digestion and absorption, making C correct. The gullet is before the stomach, the appendix is a side structure, and the large intestine follows the small intestine.
Question 4 of 5
The appendix is attached to which of the following structures?
Correct Answer: A
Rationale: The appendix is attached to the cecum, part of the colon, making A correct.
Question 5 of 5
Which of the following is a result of the low pH of the stomach?
Correct Answer: D
Rationale: Low stomach pH converts pepsinogen to active pepsin for protein digestion, making D correct.