Which of the following medications is commonly used to reduce stomach acid in the treatment of peptic ulcer disease?

Correct Answer: C

Rationale: PPIs reduce stomach acid effectively, aiding ulcer healing, making C correct; aspirin and ibuprofen worsen ulcers.

Correct Answer: B

Rationale: The submucosal (Meissner's) plexus regulates glandular secretion and local blood flow within the submucosa.

Correct Answer: D

Rationale: Tonsils are lymphatic tissue with crypts lined by epithelium, aiding in immune surveillance.

Correct Answer: B

Rationale: Taste buds are primarily on fungiform and circumvallate papillae, not filiform.

Correct Answer: A

Rationale: Taenia coli are longitudinal muscle bands in the colon.