Which of the following digestive enzymes is NOT found in intestinal juice?

Correct Answer: B

Rationale: Trypsin is produced by the pancreas and secreted into the duodenum, not found in intestinal juice, which contains enzymes like erepsin and maltase.

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.

Correct Answer: B

Rationale: Meissner's plexus is located in the submucosa and regulates glandular secretion and local blood flow.