ATI LPN
NCLEX Questions Gastrointestinal System Questions
Question 1 of 5
The function of the cardiac sphincter is to prevent backflow of acid chyme from the
Correct Answer: B
Rationale: The cardiac (lower esophageal) sphincter prevents acid chyme from refluxing into the esophagus, making B correct.
Question 2 of 5
Which of the following contributes to the digestion of lipids?
Correct Answer: C
Rationale: The gallbladder releases bile to emulsify lipids, making C correct.
Question 3 of 5
The pH of various areas within the digestive tract was taken and plotted on a graph as shown above. The reading labelled X was most likely obtained from the
Correct Answer: B
Rationale: A low pH reading (X) matches the acidic stomach environment, making B correct.
Question 4 of 5
Which of the following structures does food enter after it leaves the esophagus?
Correct Answer: C
Rationale: Food enters the stomach after the esophagus, making C correct.
Question 5 of 5
All of the following are organs of the digestive system except
Correct Answer: D
Rationale: The heart is part of the circulatory system, not the digestive system, unlike the stomach, mouth, and intestines, making D the correct answer.