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Multiple Choice
Which hormone stimulates the stomach's parietal cells to produce hydrochloric acid?
A
Cholecystokinin
B
Secretin
C
Gastrin
D
Somatostatin
Verified step by step guidance
1
Understand the role of parietal cells in the stomach: Parietal cells are responsible for secreting hydrochloric acid (HCl), which is crucial for digestion and maintaining the stomach's acidic environment.
Identify the hormone responsible for stimulating parietal cells: Gastrin is the hormone that primarily stimulates the parietal cells to produce hydrochloric acid.
Learn about gastrin: Gastrin is produced by G cells in the stomach lining and is released in response to food intake, particularly proteins, which signals the need for increased acid production.
Differentiate between the hormones listed: Cholecystokinin and secretin are hormones involved in digestion but have different roles. Cholecystokinin stimulates the gallbladder and pancreas, while secretin primarily stimulates the pancreas to release bicarbonate. Somatostatin inhibits gastric acid secretion.
Conclude with the correct hormone: Based on the roles of these hormones, gastrin is the correct answer as it directly stimulates the parietal cells to produce hydrochloric acid.