NEET Zoology Digestion and Absorption Questions Solved

Secretin and cholecystokinin are digestive hormones. They are secreted in

(a) oesophagus

(b) ileum

(c) duodenum

(d) pyloric stomach

Audio Explanation:

(C) Secretin and cholecystokinin (CCK) are two main gastrointestinal (GI) hormones secreted in duodenum of alimentary canal. CCK stimulates gall bladder contraction and thus increases the flow of bile salts into the intestine. Secretin stimulates the release of an alkaline pancreatic fluid that neutralises stomach acid as it enters the intestine.

Difficulty Level:

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