ATI RN
Digestive System Mcq Questions Questions
Question 1 of 5
Which food substance is absorbed, without digestion?
Correct Answer: C
Rationale: Vitamins are absorbed without digestion, unlike macronutrients.
Question 2 of 5
Which of the following inactivates pepsinogen into active pepsin?
Correct Answer: B
Rationale: Hydrochloric acid (HCL) in the stomach activates pepsinogen, converting it into its active form, pepsin.
Question 3 of 5
The absorption of fructose by intestinal mucosa is
Correct Answer: C
Rationale: Fructose is absorbed via facilitated transport through GLUT5 transporters in the intestinal mucosa.
Question 4 of 5
Which gastric secretion is necessary for the absorption of vitamin B12 in the small intestine?
Correct Answer: C
Rationale: Intrinsic factor, secreted by parietal cells in the stomach, binds to vitamin B12, enabling its absorption in the ileum of the small intestine.
Question 5 of 5
Micelle formation is necessary for the intestinal absorption of
Correct Answer: C
Rationale: Micelles, formed by bile salts, facilitate the absorption of fat-soluble vitamins like vitamin D in the small intestine.