PHYSIOLOGY
GASTROINTESTINAL PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
It stimulates intestinal secretion of electrolytes and water
|
|
|
Stimulate gastric acid and pepsin secretion
|
|
|
Relaxation of intestinal smooth muscle including sphincters.
|
|
|
It inhibit intestinal secretion of electrolytes and water.
|
Detailed explanation-1: -Abstract. The action of smooth muscle in the intestinal wall produces tonic contractions that maintain organ dimension against an imposed load such as a bolus of food, as well as forceful contractions that produce muscle shortening to propel the bolus along the gastrointestinal tract.
Detailed explanation-2: -Which of the following substances is released from neurons in the GI tract and produces smooth muscle relaxation? The answer is D [II C 1]. Vasoactive intestinal peptide (VIP) is a gastrointestinal (GI) neurocrine that causes relaxation of GI smooth muscle.
Detailed explanation-3: -VIP stimulates contractility in the heart, causes vasodilation, increases glycogenolysis, lowers arterial blood pressure and relaxes the smooth muscle of trachea, stomach and gallbladder. In humans, the vasoactive intestinal peptide is encoded by the VIP gene.