Large, insoluble molecules have to be digested before they can be

Correct Answer: A

Rationale: Large molecules must be broken down into smaller, soluble units before they can be absorbed across the intestinal lining.

Correct Answer: C

Rationale: The large intestine absorbs most of the remaining water from digested material, forming semi-solid feces.

Correct Answer: A

Rationale: In the oral phase, food is mechanically broken down by chewing and mixed with saliva to begin starch digestion.

Correct Answer: C

Rationale: The soft palate elevates during swallowing to close off the nasopharynx, preventing food from entering the nasal cavity. The epiglottis prevents entry into the trachea.

Correct Answer: A

Rationale: Fungiform papillae appear red due to their thin epithelium and rich vascularity in the connective tissue, not because of secondary papillae structure.