Digestion and Absorption Question 49
49. Secretin and cholecystokinin are digestive hormones. They are secreted in :
(a) Pyloric stomach
(b) Duodenum
(c) Ileum
(d) Oesophagus
Show Answer
Answer : b
Hints & Solution
(b) Secretin and cholecystokinin are secreted in the duodenum.
They provide stimulus to
(i) Secretin : Acidic chyme entry into duodenum
(ii) CCK-PZ : Presence of fat in duodenum
Their action involves:
(i) Secretin : Releases bicarbonates in the pancreatic juice.
(ii) CCK-PZ : contracts the gall bladder to release bile. Stimulating pancreas to secrete and release digestive enzymes in the pancreatic juice.
