Tag: gastrointestinal tract and liver

Questions Related to gastrointestinal tract and liver

Cholecystokinin is a

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. Bile pigment

  2. Enzyme

  3. Lipid

  4. Gastrointestinal hormone

Show answer
Correct Option: D
Explanation:
Cholecystokinin is a peptide hormone secreted from the cells of duodenum which is an organ of gastrointestinal tract. It was formerly called as pancreozymin. It stimulates the gall bladder to contract and release bile juice (because gall bladder stores bile juice secreted by liver). It also stimulates the secretion of pancreatic juice into duodenum. The secretion of cholecystokinin controlled by the amount of amino acids and fatty acids in duodenum.
So, the correct answer is 'Gastrointestinal hormone'.

Enterogastrone is secreted by

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. Gastric mucosa

  2. Oesophageal mucosa

  3. Saliva

  4. Duodenal mucosa

Show answer
Correct Option: D
Explanation:
Enterogastrone is a peptide hormone secreted by duodenal mucosa. It is secreted in duodenum when there are sugars and proteins and fatty food in the intestine. Duodenum is a part of small intestine present just after the stomach. Enterogastrone decreases gastric secretions. It also affects movement of chyme in the stomach.
So, the correct answer is 'Duodenal mucosa'.

The pH of succus entericus is

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. 6.6

  2. 5.6

  3. 2.0

  4. 7.8

Show answer
Correct Option: D
Explanation:

The pH of succus entericus is 7.8.

So the correct option is D.

A child took sugarcane and sucked its juice. Regarding this which of the following match is correct? 
Substrate      Enzyme       Site of secretion of enzyme         Products formed

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. Protein's- Pepsin, Duodenum,Polypeptides

  2. Starch- Amylase, Salivary glands, Glucose

  3. Lipids- Lipase, Pancreas Fat globules

  4. Sucrose -Invertase, Duodenum, Glucose + fructose

Show answer
Correct Option: D
Explanation:

The correct answer is (d).

Duodenum has characterized glands which secrete two hormones called as

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. Kinase, estrogen

  2. Secretin, cholecystokinin

  3. Prolactin, parathormone

  4. Estradiol, progestrone

Show answer
Correct Option: B
Explanation:

Cholecystokinin, previously called pancreozymin, is synthesized by I-cells in the mucosal epithelium of the small intestine and secreted in the duodenum. It is responsible for stimulating the digestion of fat and protein. Secretin is a peptide hormone that regulates water homeostasis throughout the body, and influences the environment of the duodenum by regulating secretions in the stomach and pancreas. Secretin is produced in the S cells of the duodenum, which are located in the crypts of Lieberkuhn.

Cholecystokinin is secretion of 

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  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.

Show answer
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

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  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

Show answer
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?

zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

  1. Secretin

  2. Gastrin

  3. Rennin

  4. Steapsin

Show answer
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'.