Page 1 of 2: Physio-- gastrin

drshru · Credits: 2193 My Scrapbook My Reading List 6 Books

* Atropine does not inhibit gastrin response to a test meal in humans because :
1. G-cells are not innervated by parasympathetic fibers.
2.G-cells are innervated by vagal fibers and stimulated by gastrin releasing polypeptide.
3.Gastrin secretion is stimulated (increased) by direct action of amino acids on G-cells.
4.G-cells are innervated by postganglionic adrenergic neurons.

sreeku · Credits: 304 My Scrapbook

well..........gastrin is secreted by direct stimulation by protein in food.............no data found on innervation of the cell

drshru · Credits: 2193 My Scrapbook My Reading List 6 Books

sreeku · Credits: 304 My Scrapbook

hi........
thank u...............got it

Maximus · Credits: 153 My Scrapbook

gastric acid secretion in the gastric phase is mainly stimulated by the release of gastrin from the G-cells in response to digested food products
Protein products and amino acids are particularly effective
Phenylalanine and tryptophan are most potent.

PYLOROOXYNTIC REFLEX: Antral distension ----> gastrin release accounts for
60-70% of maximal acid output after a peptone meal and the rest is by mechanical dilatation

Note that gastric phase accounts for 60-70% of meal stimulated acid output and it lasts until the stomach is empty.

I think this will settle all doubts

. Reference Sabiston 17th ed pg 1272

drshru · Credits: 2193 My Scrapbook My Reading List 6 Books

Gr8 maximus... Thanx a lot.

@sreeku :most welcome sreeku... anytime

druv · Credits: 264 My Scrapbook

Hi all,

Since we are discussing gastric problems , I would like to mention that I have been having symptoms of acidity and heart burns. However, after trying all safe treatments such as herbal medications but they havent helped me one bit .. Now Im taking a drug which my doctor has recommended for me called Nexium and you wont believe it, I have been feeling much better after taking it for 2 days. Now i have got used to this and I usually

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from the online pharmacies since they give me at discounted rates.

THEROCK · Credits: 1456 My Scrapbook

the answer is 2

srini23dr · Credits: 357 My Scrapbook

GASTRIN RELEASE IS STIMULATED BY GIP n POLYPEPTIDES n AMINOACIDS.

Mystic_mind · Credits: 1356 My Scrapbook

G-cells are innervated by vagal fibers and stimulated by gastrin releasing polypeptide

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