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Tracing the passage of food through the digestive system, which of the following is correct?

A.

Mouth, pharynx, large intestine, small intestine

B.

Mouth, esophagus, stomach, pharynx, small intestine

C.

Mouth, pharynx, esophagus, stomach, small intestine

D.

Mouth, pharynx, stomach, esophagus, anus

Answer and Explanation

The Correct Answer is C

A. Mouth, pharynx, large intestine, small intestine: The small intestine comes before the large intestine in the digestive tract.

B. Mouth, esophagus, stomach, pharynx, small intestine: The pharynx comes before the esophagus, not after.

C. Mouth, pharynx, esophagus, stomach, small intestine: This is the correct order of food movement through the upper GI tract.

D. Mouth, pharynx, stomach, esophagus, anus: The esophagus precedes the stomach, and the anus is the final structure after the large intestine.


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Related Questions

Correct Answer is D

Explanation

A. Causes a deficiency of intrinsic factor and pernicious anemia: Intrinsic factor is produced in the stomach, not the liver. Its deficiency leads to pernicious anemia.

B. Causes lactose intolerance: Lactose intolerance is due to lactase deficiency in the small intestine.

C. Causes gastric reflux: Gastroesophageal reflux is typically due to lower esophageal sphincter dysfunction.

D. Causes blood drug levels to reach toxic levels: The liver metabolizes drugs. Impaired hepatic function reduces drug clearance, leading to accumulation and potential toxicity.

Correct Answer is B

Explanation

A. Nothing, it's just a pass through to the next structure: The stomach plays a critical role in digestion through mixing and secretion of gastric juices.

B. Gastric juices mix with the food and the stomach muscles squeeze it: This process forms chyme through mechanical (squeezing) and chemical (acid/enzymes) digestion.

C. The food moves quickly into the small intestine: Food stays in the stomach for a period of time for processing before gradually passing into the small intestine.

D. The food is completely digested and is absorbed by tiny blood vessels in the walls of the stomach: Most digestion and nutrient absorption occur in the small intestine, not the stomach.

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