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Clinical Biochemistry: Stomach Functions

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Clinical Biochemistry: Stomach Functions

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Questions and Answers

What is the function of the stomach component known as ECL?

Regulate gastric motility

Stimulate gastric secretion and histamine release (correct)

Activate pepsinogen

Stimulate iron absorption

Which is the most potent stimulus for acid secretion by parietal cells in the stomach?

Iron absorption

Regulation by feedback pH

Stimulation of gastric secretion and histamine release (correct)

Activation of pepsinogen

What is the cause of abnormal gastric residuum volume (>100-120 ml) after a night fast?

Regurgitation of duodenal contents

Hypersecretion of gastric juice (correct)

Normal volume for a night fast

Normal retention due to delayed emptying

Which cells are responsible for the activation of pepsinogen in the stomach?

<p>Chief cells</p> Signup and view all the answers

What is the main function of K dependent ATPase enzyme in the stomach?

<p>Transport hydrogen against concentration gradient</p> Signup and view all the answers

Study Notes

Stomach Components and Functions

ECL (Enterochromaffin-like) cells produce histamine, which stimulates acid secretion by parietal cells.

Gastric Acid Secretion

The most potent stimulus for acid secretion by parietal cells is histamine.

Gastric Residuum Volume

Abnormal gastric residuum volume (>100-120 ml) after a night's fast is caused by gastric stasis or obstruction.

Pepsinogen Activation

Chief cells are responsible for the activation of pepsinogen in the stomach.

K-Dependent ATPase Enzyme

The main function of K-dependent ATPase enzyme in the stomach is to help pump H+ ions into the stomach lumen, thereby maintaining the acidic pH.

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Description

Test your knowledge on the components and functions of the stomach in clinical biochemistry. This quiz covers topics such as protein denaturation, activation of pepsinogen, iron absorption, and gastric secretion volume.