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The primary function of which organ is to deliver chyme (food bolus) to the duodenum at the proper rate?

A.

Stomach

B.

Liver

C.

Colon

D.

Esophagus

Answer and Explanation

The Correct Answer is A

A. Stomach: The stomach regulates the release of chyme into the duodenum via the pyloric sphincter, controlling the rate of gastric emptying.

B. Liver: The liver produces bile, but does not handle chyme or food bolus movement.

C. Colon: The colon processes waste after absorption and doesn’t interact with chyme from the stomach.

D. Esophagus: The esophagus moves food from the mouth to the stomach but does not regulate chyme delivery to the small intestine.


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Related Questions

Correct Answer is C

Explanation

A. Is called trypsin: Trypsin is a pancreatic enzyme, but it digests proteins, not fats.

B. Digests lipids to fatty acids and glycogen: Glycogen is related to carbohydrate storage, not a product of fat digestion.

C. Digests fats to fatty acids: Pancreatic lipase breaks down triglycerides into fatty acids and monoglycerides for absorption.

D. Is inactivated by bile: Bile actually emulsifies fats, making them more accessible to pancreatic lipase, not inactivating it.

Correct Answer is A

Explanation

A. An increase in GFR increases urine formation: A higher GFR means more plasma is filtered, leading to more urine production.

B. It is not an indication of kidney function: GFR is a primary indicator of kidney function.

C. A decrease in GFR causes polyuria: A low GFR usually leads to oliguria (low urine output), not polyuria.

D. It is unaffected by blood pressure: GFR is directly influenced by blood pressure; low pressure decreases filtration.

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