ATI LPN
Gastrointestinal System Quiz Questions Questions
Question 1 of 5
What enzyme functions optimally at a pH of 7?
Correct Answer: D
Rationale: Trypsin functions best at neutral to basic pH (around 7-8) in the small intestine, making D correct.
Question 2 of 5
Which of the following is not a component of pancreatic juice?
Correct Answer: C
Rationale: Pancreatic juice contains enzymes and bicarbonate, not HCl (stomach), making C correct.
Question 3 of 5
Which of the following results from the increased secretions by the gastric glands?
Correct Answer: B
Rationale: Gastric secretions (HCl, pepsin) increase protein hydrolysis in the stomach, making B correct.
Question 4 of 5
In humans, structures that release digestive secretions directly into the small intestine include both the
Correct Answer: D
Rationale: The pancreas and gallbladder release enzymes and bile directly into the small intestine via ducts, making D the correct answer.
Question 5 of 5
Which food would provide the most roughage for the body?
Correct Answer: B
Rationale: Lettuce and tomatoes provide fiber (roughage), unlike fish, chicken, or milkshakes, making B the correct answer.