ATI LPN
Questions About Gastrointestinal System Questions
Question 1 of 5
Structures of the small intestine that aid in the absorption of nutrients include
Correct Answer: A
Rationale: Villi increase surface area for nutrient absorption in the small intestine, making A correct; cilia and E. coli are not involved in this process.
Question 2 of 5
Which of the following structures secrete hydrochloric acid?
Correct Answer: B
Rationale: Gastric glands in the stomach secrete HCl, making B correct.
Question 3 of 5
What structure prevents food from entering the trachea?
Correct Answer: C
Rationale: The epiglottis covers the trachea during swallowing, making C correct.
Question 4 of 5
Which enzyme is most effective at pH 2.5?
Correct Answer: B
Rationale: Pepsin functions optimally at pH 2-3 in the stomach, making B correct.
Question 5 of 5
Which organ produces enzymes which aid in the digestion of fats?
Correct Answer: C
Rationale: The pancreas produces lipase to digest fats, making C correct.