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Secretin and cholecystokinin are digestive hormones. They are secreted in
  • a)
    pyloric stomach
  • b)
    duodenum
  • c)
    ileum
  • d)
    oesophagus
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Secretin and cholecystokinin are digestive hormones. They are secrete...
Brunner's glands are present in the duodenum region of small intestine. They secretes two hormones secretin and cholecystokinin. Secretin is secreted by cells in the duodenum when they are exposed to the acidic contents of the emptying stomach. It stimulates the exocrine portion of the pancreas to secrete bicarbonate into the pancreatic fluid (thus neutralizing the acidity of the intestinal contents).
Cholecystokinin (CCK), a mixture of peptides, is secreted by cells in the duodenum when they are exposed to food. It acts-
- on the gall bladder stimulating it to contract and force its contents of bile into the intestine.
- on the pancreas stimulating the release of pancreatic digestive enzymes into the pancreatic fluid. CCK also acts on vagal neurons leading back to the medulla oblongata which give a satiety signal (i.e., "that's enough food for now").
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Secretin and cholecystokinin are digestive hormones. They are secreted ina)pyloric stomachb)duodenumc)ileumd)oesophagusCorrect answer is option 'B'. Can you explain this answer?
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