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Which of the following has an abundance of lymphoid tissue in the mucosa and submucosa?

A.

Small intestine

B.

Stomach

C.

Large intestine

D.

Esophagus

Answer and Explanation

The Correct Answer is A

A. Small intestine, particularly the ileum, contains Peyer's patches, which are abundant lymphoid tissues in the mucosa and submucosa. These structures are part of the immune system, protecting the body from pathogens in the digestive tract. 

 

B. Stomach: While the stomach has some lymphoid tissue, it does not have as much as the small intestine, specifically the Peyer's patches.

 

C. Large intestine has lymphoid nodules, but it does not contain as much lymphoid tissue as the small intestine. 

 

D. Esophagus has very little lymphoid tissue compared to the small intestine, as its primary function is to transport food rather than participate in immune defense. 


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View Related questions

Correct Answer is D

Explanation

A. Minerals are absorbed directly into the bloodstream, not through lacteals.

B. Glucose is absorbed directly into the bloodstream through capillaries, not through lacteals.

C. Amino acids are absorbed into the bloodstream through capillaries, not through lacteals.

D. Triglycerides are absorbed by the lacteals in the small intestine. Lacteals are lymphatic vessels that transport absorbed lipids (including triglycerides) from the digestive tract.

Correct Answer is D

Explanation

A. Metabolic water; cutaneous transpiration: Metabolic water refers to the water produced during metabolic processes within the body. However, most body water intake comes from drinking fluids, not metabolic water.

B. Drinking; cutaneous transpiration and expired air: While drinking is indeed the main source of water intake, the greatest loss of water from the body is through urine, not cutaneous transpiration and expired air.

C. Drinking; radiation: While drinking is the primary source of water intake, radiation is not a significant way the body loses water.

D. Drinking; urine: Drinking fluids is the main source of water intake, and urine excretion is the primary way the body loses water.

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