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Which of the following structures allow the stomach to expand?

A.

Chief cells

B.

Microvilli

C.

Villi

D.

Rugae

Answer and Explanation

The Correct Answer is D

A. Chief cells: These are gastric gland cells that secrete pepsinogen, not involved in stomach expansion.

B. Microvilli: These are microscopic extensions in the small intestine for nutrient absorption, not expansion.

C. Villi: Like microvilli, villi are found in the small intestine, not the stomach.

D. Rugae: Rugae are folds in the stomach lining that allow it to expand when filled with food or liquid.


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Related Questions

Correct Answer is D

Explanation

A. Glucose is used up by the metabolizing nephron units: Nephrons do not metabolize all glucose; their role is to filter and reabsorb.

B. Glucose cannot be filtered: Glucose is a small molecule and is easily filtered by the glomerulus.

C. Glucose is converted to ammonia and excreted as urea: This describes protein metabolism, not glucose.

D. All filtered glucose is reabsorbed: In healthy kidneys, 100% of filtered glucose is reabsorbed in the proximal tubule, so none appears in urine unless blood levels are too high (e.g., diabetes).

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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