ATI LPN
Gastrointestinal System Quiz Questions Questions
Question 1 of 5
The epithelium lining the entire GI tract is:
Correct Answer: D
Rationale: The GI tract epithelium varies: stratified squamous in the esophagus and anus for protection, simple columnar in the stomach and intestines for secretion/absorption.
Question 2 of 5
Lymphocytes proliferate in relatively permanent sites in connective tissue which contain germinal centers surrounded by dense concentrations of incoming and outgoing cells. These sites are called:
Correct Answer: D
Rationale: Lymph nodules are sites of lymphocyte proliferation within mucosa, distinct from lymph nodes.
Question 3 of 5
Permanent folds in the wall of the intestine, containing a core of submucosa, are called:
Correct Answer: B
Rationale: Plicae circulares are permanent folds in the small intestine with a submucosal core.
Question 4 of 5
Choose the best description of the fundic stomach.
Correct Answer: B
Rationale: The fundus has no villi, with glands (parietal, chief cells) and a uniform surface epithelium.
Question 5 of 5
Which of the following regions of the GI tract is characterized by short tubular invaginations (crypts or pits) which are not lined by dividing, differentiating cells?
Correct Answer: B
Rationale: Gastric pits in the stomach lack stem cells, unlike intestinal crypts.