Filiform papilla of tongue:

Correct Answer: B

Rationale: Filiform papillae are covered by parakeratinized epithelium and are numerous on the anterior tongue, but they do not carry taste buds or have Von Ebner's glands.

Correct Answer: D

Rationale: Cardiac gland pits are shallow, not deep, occupying less than half the mucosal thickness, unlike fundic glands.

Correct Answer: D

Rationale: Caveolated (tuft) cells are sensory, not regenerative; stem cells handle mucosal regeneration.

Correct Answer: B

Rationale: The space of Disse contains plasma, Ito cells, and hepatocyte microvilli, but blood cells remain in the sinusoids.

Correct Answer: D

Rationale: Kupffer cells are in the sinusoidal lumen, not the space of Disse, which contains Ito cells, plasma, and microvilli.