Actions of gastrointestinal hormones, Biology

Assignment Help:

Actions of Gastrointestinal hormones

Secretin is released under acidic conditions (low pH); digested fat or bile initiates production of pancreatic juice low in enzymes but rich in salts important in neutralising the acid chyme. CCK is secreted when partially digested proteins or HCl (to a lesser extent) are present. It induces the flow of pancreatic juice rich in enzyme. Figure summaries the action of GI hormones.

1197_Actions of Gastrointestinal hormones.png

Figure: Action of several gastrointestinal hormones. Gastrin is secreted in response to intragastric proteins, stomach distention and stimulation by vagus nerve. Gastrin from the lower stomach stimulates HCI secretion and pepsin from secretory cells. Cholecystokinin (CCK) stimulates pancreas to secrete digestive enzymes and bases to neutralise and digest chyme. It also induces contraction of gall bladder to secrete bile salts. CCK is secreted in response to arrival of amino acids and fatty acids in deodenum from stomach.

These two hormones inhibit stomach motility. Arrival of fat from the stomach initiates the release of CCK by intestinal mucosa, this causes gall bladder to release bile which aids in fat digestion.


Related Discussions:- Actions of gastrointestinal hormones

Why superoxide radical scavenging of beverages, Why is Superoxide radical s...

Why is Superoxide radical scavenging of beverages such red wine, grape juice measured at 560 nm?

Explain how movement is controlled in protozoans., Movement is even control...

Movement is even controlled by organelles, cilia and flagella. These and the pseudopodia in the amoebas give these small creatures movement, something we associate with animals. Es

Blood protozoan and ricketsial diseases - trypanosomiasis, B l oo d Prot...

B l oo d Protozoan and Ricketsial Diseases T r y p a n o s o m i a si s It is also known as surra in equines and tibarsa in camel and results in intermitte

St-segment depression after hyperventilation, Q. ST-segment depression aft...

Q. ST-segment depression after  hyperventilation? Patients with abnormal autonomic drive have demonstrated ST-segment depression after hyperventilation as well as after exercis

What do you mean by varices, Q. What are varices? Why are they more common ...

Q. What are varices? Why are they more common in the inferior limbs? Varix means abnormal enlargement of veins and the Varices occur when excessive pressure against the normal

What is the destination of the branchial clefts in humans, Q. What is the d...

Q. What is the destination of the branchial clefts in humans? In humans the branchial clefts located in the anterior region of the pharynx also known as pharyngeal clefts are p

How the arrangement of cells helps with tissue functioning, PROVIDE a speci...

PROVIDE a specific example for epithelial and connective tissues, how the arrangement of cells helps with tissue functioning?

Epiboly - mechanism of gastrulation, EPIBOLY - The epibolic movement...

EPIBOLY - The epibolic movements occur only in the prospective ectodermal blastomeres. In the blastula of frog, migration and rearrangement of microceres over megameres i

Explain the endocrine glands involved in the menstrual cycle, What are the ...

What are the endocrine glands involved in the menstrual cycle? What are the hormones in action? The endocrine glands that secrete hormones included in the menstrual cycle are t

Basal metabolism and energy expenditure at high altitude, Define Basal Meta...

Define Basal Metabolism and Energy Expenditure at High Altitude? The energy and nutrient requirements depend upon total energy expenditure and metabolic rate of the individual.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd