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Small Intestine Anatomy and Function

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Questions and Answers

What is the primary function of the intestinal epithelial barrier?

To produce bicarbonate

To facilitate the passage of pathogens into the bloodstream

To control the absorption of nutrients and prevent the passage of toxins (correct)

To regulate the autonomic nervous system

Where does digestion begin?

In the large intestine

In the mouth (correct)

In the stomach

In the small intestine

What percentage of nutrient absorption occurs in the small intestine?

100%

95% (correct)

50%

75%

What is the purpose of Brunner's glands in the duodenum?

To produce bicarbonate to neutralize acidic chyme (D) Signup and view all the answers

What type of cells are found throughout the small intestine and secrete mucous?

Goblet cells (A) Signup and view all the answers

What is the primary site for cationic mineral absorption in the small intestine?

Proximal duodenum (B) Signup and view all the answers

What are the crypts of Lieberkuhn responsible for producing?

Secretin and enteropeptidase (A) Signup and view all the answers

What is the function of the intestinal glands found in the jejunum?

Secretion of digestive enzymes, mucous, and hormones (A) Signup and view all the answers

What is the role of the hepatopancreatic sphincter?

Determination of bile and pancreatic enzymes delivery to the duodenum (B) Signup and view all the answers

What is the function of the villi in the jejunum?

Increase in surface area for nutrient absorption (D) Signup and view all the answers

What is the main function of the Peyer's patches found in the ileum?

Immune surveillance and defense (C) Signup and view all the answers

What is the characteristic of the jejunum that ensures efficient delivery of absorbed nutrients to the rest of the body?

Rich blood supply from the superior mesenteric artery (D) Signup and view all the answers