Tag: coordination in human beings- chemical control

Questions Related to coordination in human beings- chemical control

Cholecystokinin is secretion of 

  1. Duodenum, that causes contraction of gall bladder.

  2. Goblet cells of ileum stimulates secretion of succus entricus.

  3. Liver and controls secondary sex characters.

  4. Stomach that stimulates pancreas to release juice.


Correct Option: A
Explanation:

Cholecystokinin (CCK), formerly called pancreozymin, is a digestive hormone released with secretin, when food from the stomach reaches the duodenum. Cholecystokinin causes contraction of the gallbladder, which forces bile into the duodenum.

Secretin

  1. Stimulates enzymes secretion by pancreas, inhibits acid secretion in stomach, stimulates gall bladder

  2. Stimulates bicarbonate secretion by pancreas, inhibits acid secretion in stomach, stimulates bicarbonate secretion by liver

  3. Stimulates acid secretion in stomach, potentiates action of CCK, inhibits intestinal movement

  4. Stimulates gall bladder, stimulates bicarbonate secretion by pancreas


Correct Option: B
Explanation:

Secretin stimulates the release of a watery bicarbonate solution from the pancreatic and bile duct epithelium. Secretin increases water and bicarbonate secretion from duodenal Brunner's glands to buffer the incoming protons of the acidic chyme. It also enhances the effects of cholecystokinin to induce the secretion of digestive enzymes and bile from pancreas and gallbladder, respectively.

Which of the following belongs to the class of pepsin and trypsin?

  1. Secretin

  2. Gastrin

  3. Rennin

  4. Steapsin


Correct Option: C
Explanation:
Chymosin, known also as rennin, is a proteolytic enzyme related to pepsin that synthesized by chief cells in the stomach of some animals. Its role in digestion is to curdle or coagulate milk in the stomach, a process of considerable importance in the very young animal.
So, the correct option is 'Rennin'.