Tag: zoology
Questions Related to zoology
CCK and secretin is secreted by
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Stomach
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Ileum
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Duodenum
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Colon
CCK is cholecystokinin and secretin are released by duodenum cells and CCK acts upon gallbladder for the secretion of bile while secretin stimulates stomach and they both stimulate the pancreas to secrete enzymes and hydrogen bicarbonate that neutralize acidic chyme.
Which of the following is target organ of secretin hormone ?
a. Exocrine part of pancreas
b. Endocrne part of pancreas
c. Stomach
d. Liver
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a, b, c & d
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a, c & d
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a only
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a & d
Secretin is a hormone that regulates water homeostasis throughout the body and influences the environment of the duodenum by regulating secretions in the stomach, pancreas, and liver. It is a peptide hormone produced in the S cells of the duodenum, which are located in the intestinal glands. Secretin primarily functions to neutralize the pH in the duodenum, allowing digestive enzymes from the pancreas (e.g., pancreatic amylase and pancreatic lipase) to function optimally. Secretin targets the pancreas; pancreatic centroacinar cells have secretin receptors in their plasma membrane.
Which of the following is the function of enterogastrone ?
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It inhibits the secretion of gastric juice
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It stimulates the secretion of digestive juice in the stomach
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It stimulates the flow of pancreatic juice
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It regulates the flow of bile
Point out the odd one:
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Cortiocotropin
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vasopressin
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Noradrenaline
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Prolactin
Which of the following hormones has effect both on stomach and pancreas.
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Secretin
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Cholecystokinin
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Gastrin
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All of the above
Hormones are the chemicals which transfer signal from one part to the other. There are several hormones which have an effect on the stomach, pancreas as well as liver, these hormones are as follows:
- Secretin - It is secreted in the upper lining of the stomach and also released in the pancreas. These are responsible for the secretion in the stomach and pancreas and regulates acidity.
- Cholecystokinin - It is produced by the lining of the wall of the stomach and stimulates gall bladder to release bile. It induces the production of digestive enzymes in pancreas through pancreatic juice.
- Gastrin - It is produced by Gastrin cells also called as G - cells. It helps in the secretion of gastric juices in the stomach and pancreas.
So, the correct option is 'All of the above'.
Secretin.
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Stimulates enzymes secretion by pancreas, inhibits acid secretion in stomach, stimulates gall bladder
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Stimulates bicarbonate secretion by pancreas, inhibits and secretion in stomach, stimulates bicarbonates secretion by liver
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Stimulates acid secretion in stomach, potentiates action of CCK, inhibits intestinal movement
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Stimulates gall bladder, inhibits acid secretion in stomach, stimulates bicarbonate secretion by pancreas
Find the correctly matched pair among the following.
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Pineal gland - does not influence menstrual cycle.
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Corpus lutem - secretes oxytocin.
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Interstitial cells - erythopoietic.
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Cholecystokinin - stimulates pancreatic enzyme secretions.
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Thyroxine - triiodothyronine.
Cholecystokinin is a peptide hormone of the gastrointestinal system, responsible for stimulating the digestion of fat and protein. Cholecystokinin, previously called pancreozymin, is secreted in the duodenum and causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively.
The hormone involved in the discharge of pancreatic juice in mammal is called as
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Gastrin
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Secretin
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Secretin and CCK
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Enterogastrone
The secretion of pancreatic juice is stimulated by secretin and CCK, produced by endocrine cells in the walls of the duodenum. The presence in the duodenum of acid material from the stomach stimulates the production of these hormones.
Which part of the digestive system secretes cholecystokinin?
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Intestine
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Pancreas
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Stomach
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Gall bladder
Cholecystokinin, previously called pancreozymin, is synthesized by I-cells in the mucosal epithelium of the small intestine and secreted in the duodenum, and causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively.
Function of cholecystokinin is to
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Contract gall bladder and release pancreatic juice
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Increase bile prodcution
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Decrease bile production
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Increase digestion
Contraction of the muscle wall in the gallbladder is stimulated by the vagus nerve of the parasympathetic system and by the hormone cholecystokinin, which is produced in the upper portions of the intestine. The contractions result in the discharge of bile through the bile duct into the duodenum of the small intestine.