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Questions and Answers
What is the function of the stomach component known as ECL?
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?
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?
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?
Which cells are responsible for the activation of pepsinogen in the stomach?
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What is the main function of K dependent ATPase enzyme in the stomach?
What is the main function of K dependent ATPase enzyme in the stomach?
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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.
