Which one of the following four secretions is correctly matched with its source, target and nature of action?

Gastrin -- Stomach lining -- Oxyntic cells -- Production of HCl

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Inhibin -- Sertoli cell -- Hypothalamous -- Inhibition of secretion of gonadotropin releasing hormone

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Enterokinase -- Duodenum -- Gall bladder -- Release of bile

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ANF -- SA node -- JG apparatus -- Inhibition of release of renin

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Solution

The correct option is A Gastrin -- Stomach lining -- Oxyntic cells -- Production of HCl
Gastrin is a peptide hormone produced in the stomach lining. It stimulates the gastric acid (HCl) secretion by the oxyntic cells of stomach. This HCl further helps in digestion process. Inhibin is secreted by granulosa and sertoli cells in response to FSH. It inhibits secretion of follicle-stimulating hormone (FSH) by the pituitary gland. Enterokinase hormone is secreted by the duodenum. It converts the inactive trypsinogen into trypsin that helps in digestion of proteins. Atrial natriuretic factor (ANF) is secreted by atrium of heart. It inhibits release of renin by targeting juxtaglomerular apparatus.
Thus, the correct answer is option A.

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Q. Match the Column-I and II choose the correct option.

Column - I	Column - II
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(b)Cholecystokinin	(ii) Stimulates gall bladder to release bile juice
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(d) Enterogastrone	(iv) Inhibits gastric juice secretion and stops stomach churning

Q. Which of the following is/are functions of secretin?
I. It releases bicarbonates into the pancreatic juice
II. Promotes the secretion of bile
III. It inhibits gastric secretion and motility

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