Multiple Choice
How does antidiuretic hormone (ADH) influence the regulation of water output in the body?
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16. The Endocrine System
Introduction to the Endocrine System
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Which structure releases the hormone secretin?
A
Small intestine
B
Thyroid gland
C
Pituitary gland
D
Pancreas
Verified step by step guidance1
Understand the role of secretin: Secretin is a hormone that plays a crucial role in the digestive process by regulating the pH of the small intestine.
Identify the function of secretin: Secretin stimulates the pancreas to release bicarbonate, which neutralizes stomach acid entering the small intestine.
Recognize the location of secretin release: Secretin is released by the S cells located in the lining of the duodenum, which is the first part of the small intestine.
Differentiate between the structures listed: The thyroid gland, pituitary gland, and pancreas have different functions and do not release secretin.
Conclude that the small intestine is the correct structure: Based on the function and location of secretin release, the small intestine is the structure that releases secretin.
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