What is a result of increased peristalsis in the duodenum?

Correct Answer: C

Rationale: Faster peristalsis reduces time for nutrient absorption, like amino acids, making C correct.

Correct Answer: C

Rationale: Assuming X connects mouth to stomach, it's the esophagus, making C correct.

Correct Answer: B

Rationale: Peristalsis churns food, increasing its surface area, making B correct.

Correct Answer: D

Rationale: Assuming Z follows the stomach, it's the duodenum, making D correct.

Correct Answer: C

Rationale: Chemical digestion starts with salivary amylase in the mouth and completes in the small intestine with pancreatic and intestinal enzymes, making C the correct answer.