ATI RN
Digestive System Practice Questions Questions
Question 1 of 5
What provides the luminal surface of the intestinal wall its characteristics?
Correct Answer: B
Rationale: The luminal surface is smooth and slippery due to mucus secreted by goblet cells in the mucosa, not the peritoneum, which is external.
Question 2 of 5
About nasopharynx all true except:
Correct Answer: C
Rationale: The nasopharynx is lined by pseudostratified ciliated epithelium and contains the pharyngeal tonsil (adenoids), but the palatine tonsils are located in the oropharynx, not the nasopharynx.
Question 3 of 5
Concerning Circumvallate papilla the following is true EXCEPT:
Correct Answer: A
Rationale: Circumvallate papillae are the least numerous (about 8-12 in humans), not the most numerous, and they carry many taste buds with Von Ebner's glands.
Question 4 of 5
(Auerbach's) plexus found in:
Correct Answer: A
Rationale: Auerbach's plexus is located between the circular and longitudinal layers of the muscularis externa, controlling gut motility.
Question 5 of 5
In case of atrophic gastritis, deficiency in vitamin B12 result from damage of:
Correct Answer: C
Rationale: Parietal cells secrete intrinsic factor, necessary for vitamin B12 absorption; their damage in atrophic gastritis leads to B12 deficiency.