ATI LPN
Questions About Gastrointestinal System Questions
Question 1 of 5
Along most of the GI tract (except for the oral cavity and lower anal canal), the basal boundary of the mucosa is marked by:
Correct Answer: A
Rationale: The muscularis mucosae, a thin smooth muscle layer, separates the mucosa from the submucosa in most of the GI tract.
Question 2 of 5
The germinal centers of lymph nodules function as sites where:
Correct Answer: D
Rationale: Germinal centers are where B lymphocytes proliferate in response to antigens.
Question 3 of 5
Microscopic finger-like projections of the intestinal mucosa are called intestinal:
Correct Answer: C
Rationale: Villi are finger-like projections increasing absorption surface area.
Question 4 of 5
Choose the best description of the jejunum.
Correct Answer: A
Rationale: The jejunum has villi, crypts, goblet cells, and an unspecialized submucosa.
Question 5 of 5
Which of the following regions of the GI tract is characterized by numerous short tubular invaginations but no villi?
Correct Answer: D
Rationale: The colon has crypts but no villi, unlike the small intestine.