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18 Questions

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Small Intestine Sections and Functions

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Questions and Answers

What is the main function of the gastric glands in the stomach?

To produce mucus

To regulate stomach pH

To absorb nutrients

To secrete digestive enzymes (correct)

What type of cells primarily make up the walls of the gastric pit?

Mucous cells (correct)

Enteroendocrine cells

Oxyntic cells

Goblet cells

What is the approximate increase in surface area of the small intestine due to the combination of circular folds, villi, and microvilli?

800-fold

500-fold

600-fold (correct)

700-fold

How does the stomach protect itself from self-digestion?

By secreting a thick coat of bicarbonate-rich mucus Signup and view all the answers

Which part of the small intestine is responsible for the absorption of bile acids and vitamin B12?

Ileum Signup and view all the answers

What is the main function of the small intestine in the digestive system?

To absorb nutrients Signup and view all the answers

What is the outermost layer of the gastrointestinal tract composed of?

Serosa Signup and view all the answers

What is the name of the junction that connects the small intestine to the large intestine?

Ileocecal sphincter Signup and view all the answers

What are the two main types of gastric glands in the stomach mucosa?

Oxyntic and pyloric glands Signup and view all the answers

Which of the following neural plexuses is located in the submucosa layer of the gastrointestinal tract?

Meissner’s plexus Signup and view all the answers

What is the main function of the duodenum in the small intestine?

Neutralisation of protein, lipid, and carbohydrate digestion Signup and view all the answers

What is the main function of the mucosa layer in the gastrointestinal tract?

Absorption of nutrients and secretion of hormones Signup and view all the answers

What percentage of total saliva secretions is contributed by the major salivary glands?

90% Signup and view all the answers

What is the primary function of saliva in digestion?

Moisten the food Signup and view all the answers

What is the pH of saliva?

7 Signup and view all the answers

What is the pharynx part of?

Both the digestive and respiratory systems Signup and view all the answers

What component of the digestive system processes ingested foods into molecular forms?

Gastrointestinal tract Signup and view all the answers

What is the purpose of the digestive system?

To transfer small molecules, ions, and water to the body's internal environment Signup and view all the answers