Which process matches the definition: The uptake of substances by the GI tract?

Correct Answer: A

Rationale: Absorption is the process by which nutrients are taken up from the GI tract into the bloodstream.

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: C

Rationale: Taste buds are absent in the esophagus; they are present on the tongue, soft palate, and epiglottis for taste perception.

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.