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Carbohydrate digestion begins in the____________ whereas protein digestion begins in the ___________.

A.

liver; small intestine

B.

mouth; stomach

C.

small intestine; stomach

D.

mouth; small intestine

Answer and Explanation

The Correct Answer is B

A. Liver; small intestine: Carbohydrate and protein digestion do not begin in the liver or the small intestine. The liver is involved in metabolism but not in the initial digestion of carbohydrates or proteins. 

 

B. Mouth; stomach: Carbohydrate digestion begins in the mouth with salivary amylase, while protein digestion begins in the stomach with pepsin.

 

C. Small intestine; stomach: Carbohydrate digestion begins in the mouth and not the small intestine. Protein digestion starts in the stomach, not the small intestine. 

 

D. Mouth; small intestine: Carbohydrate digestion begins in the mouth, but protein digestion begins in the stomach, not the small intestine.


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Correct Answer is D

Explanation

A. Corpuscle: The corpuscle refers to the glomerulus and Bowman's capsule, not the medial concavity of the kidney.

B. Cortex: The cortex is the outer region of the kidney, not the medial concavity.

C. Medulla: The medulla refers to the inner part of the kidney but not specifically the medial concavity.

D. Hilum: The hilum is the medial concavity of the kidney where blood vessels, nerves, and the ureter enter and exit.

Correct Answer is B

Explanation

A. Pyelitis is an infection of the renal pelvis and does not cause sweet-smelling urine.

B. Diabetes mellitus often causes glycosuria (glucose in urine), which can make urine taste sweet.

C. Renal calculus (kidney stones) does not affect urine sweetness.

D. Acute glomerulonephritis affects kidney function and urine appearance but does not specifically cause sweet-smelling urine.