Q1. Of the following which one causes the contraction of smooth muscles behind a bolus of...

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Medical Sciences

Q1. Of the following which one causes the contraction ofsmooth muscles behind a bolus of food?
A. Release of Acetycholine by sensroy neruons of the entericnervous system
B. Release of acetylcholine by motor neurons of the entericnervous system
C. Release of nitric oxide by Interstital cells of cajal
D. The release of epinephrine from the sympathetic nervoussystem
Q2. H+ is secereted in the stomach by?
A. H+/K+ ATPase pump
B. H+/HCO3- antiport
C. H+/Cl- symport
D. H+ ATPase pump
Q3 Of the following which one drains secertions from thepancreas, gall bladder, and the liver into theduodenum?
A. Cyctic duct
B. Pancreatic duct
C. Common bile duct
Q4. HCO3- is secereted from pancreatic cells into thepancreaic duct by which of the follwoing apical membranetransporters?
A. HCO3-/Cl- antiport
B. HCO3-/Cl- ATPase pump
C. HCO3-/H+ antiport

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3.8 Ratings (452 Votes)

1 Contraction of smooth muscles behind a bolus of food is caused by B Release of acetylcholine by motor neurons of the enteric nervous system Peristalsis is the smooth muscle contractions that propels foodstuffs distally through the esophagus and intestine There are two mechanism possible One group of interneurons activates excitatory motor neurons above the bolus which contains acetylcholine stimulates the contraction of muscles above the bolus Other group of interneurons See Answer

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