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

Explain basic concepts of nutrition science, Explain Basic Concepts of Nutr...

Explain Basic Concepts of Nutrition Science? Food is the very basis of our life, the food we eat, though the process of digestion, we know, is converted into nutrients, and the

What is the major biological function of ribosomes, Q Where in the cell can...

Q Where in the cell can ribosomes be found? What is the major biological function of ribosomes? Ribosomes can be found free in the cytoplasm, adhered to the external side of th

Pathophysiology and assessment of purpura, Pathophysiolog y   Normal...

Pathophysiolog y   Normally the platelets are formed from megakaryocytes (stem cells) in the.  bone marrow. These cells mature, fragment and are released in  the blood strea

Giant nerve fibres, Giant Nerve Fibres We now know that giant nerve f...

Giant Nerve Fibres We now know that giant nerve fibres take place in the central nervous system of many polychaetes, oligochaetes, insects cephalopod etc. They are broader an

What is population growth rate, Q. What is population growth rate? The ...

Q. What is population growth rate? The Population growth rate (PGR) is the percent variation between the numbers of individuals in a population at two different times. Thus the

Locating the problem in diabetes mellitus, Q. Locating the Problem in diabe...

Q. Locating the Problem in diabetes mellitus? After having good rapport with the client and the family; you will try to collect the information about the patient, family and he

The complex nature of earthquake ground motion, In fact a real earthquake g...

In fact a real earthquake ground motion at a particular site is much more complicated that than the simple waveform depicted. It would be beneficial if we make comparison between t

What is sustainable agriculture, What is sustainable agriculture? Desc...

What is sustainable agriculture? Describe the contribution of biopesticides and biofertilisers in sustainable agriculture.

Where is the gall bladder located, Where is the gall bladder located? T...

Where is the gall bladder located? The gall bladder is located in the Upper Right Quadrant (URQ) of the abdomen just below the liver. It keeps bile secreted by the liver. The d

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