When a person eats some egg white, protein and water enter the stomach. Which substances are found leaving the stomach and leaving the small intestine?

Correct Answer: A

Rationale: Proteins are partially digested in the stomach and converted to amino acids in the small intestine.

Correct Answer: D

Rationale: The hepatic portal vein carries nutrient-rich blood from the intestines to the liver for processing before it enters systemic circulation.

Correct Answer: B

Rationale: Peristalsis is the rhythmic muscular action that moves food through the digestive tract.

Correct Answer: B

Rationale: In the intestinal phase, chyme is mixed with pancreatic juice and bile, and nutrients are absorbed primarily in the small intestine.

Correct Answer: C

Rationale: The vermilion zone's epithelium is thinner than the outer labial skin, not thicker, allowing the underlying vascularity to show through, giving it a red appearance.