Secondary papilla has separate epith. Cap in:

Correct Answer: A

Rationale: Filiform papillae have secondary papillae with separate epithelial caps extending from the primary papillae, unlike other papillae types.

Correct Answer: C

Rationale: The isthmus contains stem cells, surface epithelial cells, and parietal cells, but chief cells are found deeper in the gland body and base.

Correct Answer: A

Rationale: Parietal cells are rich in mitochondria for energy, not rER, which is more prominent in chief cells.

Correct Answer: D

Rationale: Ito (stellate) cells store vitamin A and contribute to fibrosis, but Kupffer cells, not Ito cells, are phagocytic.

Correct Answer: B

Rationale: Striated ducts have basal acidophilic striations due to mitochondria, not basophilic granules.