1. pepsin (enzyme) is secreted by a. chief or zymogenic cells b. epithelial cells c. pancreas. d. liver. 2. water is mainly absorbed in a. colon b. stomach c. oesophagus d. small intestine. 3. the food which has mechanical and chemical digestion inside the stomach is called. a. amino. b. chyme c. chyle. d. bolus. ....... this questions are tick tick the correct answer...............
Answers
Explanation:
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Answer: 1.About some GIT hormones(true or false):
(A)Gastrin is released as a result of stomach distension and vagal
stimulation.
(B)Secretin stimulates the pancreatic acinar cells to secrete enzymes.
(C) pancreozymine is itself CCK and it has a structural relationship to
gastrin.
(D) Secretin causes excessive gastric Secretion and accelerates gastric
emptying.
2.VIP causes(true or false):
(A) stimulation of the intestinal celles to secrete water and electrolytes.
(B)Inhibiton of gastric Secretion.
(C)Relaxation of the lower esophageal sphincter.
(D)Peripheral V.C.
3. Stimulation of Gastrointestinal Secretion include:
(A)Chemical stimuli.
(B)Tactile stimulation.
(C)A and B.
(D) Distension.
(E)All are correct.
4.The Secretin hormone:
(A)Is secreted by the pancrease.
(B)Is released by the pyloric mucosa.
(C)Contracts the gall bladder wall.
(D)Increases the pancreatic Secretion of water and HCO3-.
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5.The GIT is controlled by:
(A)Its own intrinsic nervous system(auerbach,
s and meissner,
s plexuses).
(B)The sympathetic N.S.
(C) The para sympathetic N.S.
(D)Only B&C.
(E)A,B&C.
6.I nhibition of the myenteric plexus leads to which of the following?
(A) Increased Secretion of Secretin from the duodenum.
(B)Decreased gut motility.
(C)Hyperacidity in the stomach.
(D)Diarrhea.
7.the Secretion of gastrin cease(stop):
(A)When the stomach is distended by meal.
(B) )When the PH of the gastric content is Decreased below 2.
(C)If the fundic mucosa is anaesthesized.
(D) If the vagi are Stimulate.
(E)If histamine is injected.
8. Stimulation of sub mucosal plexus result in an Increase in which of
the following?
(A) motility of the gut.
(B) Secretion of the gut.
(C) sphincter tone.
(D)stomach PH.
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9. Secretin:
(A)Is a GIT hormone Secreted from the pylorus.
(B) Stimulates a pancreatic Secretion rich in enzymes.
(C)Acts as powerful cholagogue.
(D)Is secreted as aresult of vagus nerve stimulation.
(E) Stimulates gastric Secretion.
(F)Is released as a result of contact of acid chyme to the duodenal mucosa.
10.About the GIT hormones affecting gastric function:
(A)CCK and Secretin Increase both gastric Secretion and motility.
(B) gastrin Secretion is Stimulated by the digestive products of fat.
(C) gastrin inhibits gastric Secretion and delay gastric emptying.
(D)GIP and VIP inhibit gastric Secretion.
(E)Somatstatin is a powerful Stimulator to both gastric Secretion and
motility.
11.Cholecystokinin:
(A) Release is Stimulated by protein hydrolysates in the lumen of the small
intestine.
(B)Is released from gastric mucosal cells.
(C) Release is Stimulated by distension of the colon.
(D)A and C are correct.
12.Amajor part of the gall bladder contractions are due to:
(A) sympathetic contraction OF the viscus.
(B)The overfilling of the gall bladder with bile.
Explanation: