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Physiology

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GIT

Question
5 out of 11
 

Action of cholecystokinin include all of the following except:



A Contraction of gall bladder

B Secretion of panacreatic juice rich in enzymes

C Increases the secretion of enterokinase

D Augments the action of secretion of gastrin

E Stimulated gastric emptying

Ans. E Stimulated gastric emptying
  1. Distribution:­

a. CCK8 and CCK12 secreted by duodenum and jejuneum.

b. CCK-4 by enteric nerves and pancreateic nerves

c. CCK58 and CCK8 found in brain ~especially in cerebral cortex, where involved in the regulation of food intake, anxiety and analgesia.

  1. Function of CCK: ­

a. Contraction of gall bladder Q

b. Secretion of the pancreatic juice rich in enzyme Q

c. Augments the action of secretin producing secretion an alkaline pancreatic juice. Q

d. Inhibits gastric emptying Q

e. Exerts a trophic effect on the pancrease, Q

f. Increases the secretion of enterokinase Q

g. Enhance the motility of the small intestine. Q

h. Augments the contraction of pyloric sphincter

i. CCk and gastrin stimulate glucagon secretion. Q

  1. Secretion of CCK is increased by: ­

a. Contact of the intestinal mucosa with the products of digestion particularly peptides, and amino acids

b. By the presence of fatty acids containing more than 10 carbon atoms in duodenum.

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