ANATOMY
GASTRO INTESTINAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Acetylcholine act by cAMP pathway
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Gastrin act by cAMP pathway
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Hitamine act by PIP2 pathway
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Histamine act by cAMP pathway
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Detailed explanation-1: -Answer and Explanation: The correct option is b. Histamine is present in almost all tissues of the human body. It is mainly stored in the granules of mast cells.
Detailed explanation-2: -Histamine regulates a plethora of pathophysiological and physiological processes, such as secretion of gastric acid, inflammation, and the regulation of vasodilatation and bronchoconstriction (29, 30). In addition, it can also serve as a neurotransmitter (31).
Detailed explanation-3: -Answer and Explanation: Of the given statements about histamines the one that is not correct is that it is a bronchodilator. Histamine is able to stimulate smooth muscle contraction primarily in the lungs.
Detailed explanation-4: -The histamine receptor H2 belongs to the rhodopsin-like family of G protein-coupled receptors. It is an integral membrane protein and stimulates gastric acid secretion. It also regulates gastrointestinal motility and intestinal secretion and is thought to be involved in regulating cell growth and differentiation.