ATI RN
Digestive System Practice Questions Questions
Question 1 of 5
Which element in the molecule of urea shows that it is formed from amino acids and not from glucose?
Correct Answer: C
Rationale: Nitrogen is a key component of amino acids and is retained in urea during deamination.
Question 2 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 3 of 5
What happens during the gastric phase of digestion?
Correct Answer: B
Rationale: The gastric phase involves the stomach churning food with gastric secretions (e.g., HCl, pepsin) to form chyme.
Question 4 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 5 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.