What happens when food reaches the stomach?

Correct Answer: C

Rationale: In the stomach, gastric juices (acid, enzymes) mix with food, and muscles churn it into chyme, making C correct. Digestion occurs (not A), food doesn't move quickly to the intestine , and complete digestion/absorption happens later in the small intestine, not stomach .

Correct Answer: C

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

Correct Answer: D

Rationale: Bacteria in the large intestine produce vitamins like K, making D 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.