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 MCQs on GIT physiology with their answers

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مُساهمةموضوع: MCQs on GIT physiology with their answers    الإثنين أكتوبر 03, 2011 6:45 am

1-The process by which large pieces of food are cut and crushed into smaller pieces is called…………………..
a-emulsification
b-deglutition.
c-mechanical digestion.
d-absorption.
e-peristalsis.

2-The enzyme in saliva helps to digest…………………
a- starch.
b- proteins.
c- fats.
d- apple sauce.
e- nothing.

3- The gastric juice produced in the stomach contains mucus, hydrochloric acid, and………………………
a- bile.
b- lipase.
c- pepsin.
d- amylase.
e- chyme.

4- The wavelike movement of muscle that pushes food through the digestive system is called………………..
a-emulsification
b-defecation.
c- chemical digestion.
d-absorption.
e-peristalsis.





5- The enzyme that digests proteins is…………….
a- chyme.
b-amylase.
c- lipase.
d- pepsin.
e- bile.

6- The process of breaking down large droplets of fat into small droplets of fat is called………………
a-emulsification
b-deglutition.
c-mechanical digestion.
d-absorption.
e-peristalsis.

7- The digestion of all types of nutrients is completed in the………………….
a- stomach.
b- esophagus.
c- small intestine.
d- liver.
e- large intestine.

8- Food that leaves the stomach is in the form of a thick liquid. This liquid is called……………………….
a- bile.
b- feces.
c- villus.
d- chyme.
e- pepsin

9- The process by which foods are changed into forms the body can use is called……………………
a- peristalsis.
b- digestion.
c- emulsification.
d- deglutition.
e- absorption
10- Digestion of proteins begins in the……………
a- large intestine.
b- small intestine.
c- esophagus.
d- mouth.
e- stomach

11- Digestion of fats begins in the……………..
a- large intestine.
b- small intestine.
c- esophagus.
d- mouth.
e- stomach

12- Which of the following enzymes is correctly matched with its site of production?
a- Pepsin – liver.
b- Lipase – stomach.
c- Amylase – pancreas.
d- Trypsin – salivary glands.
e- peptidase- mouth.

13-The enzyme amylase is produced by which organs?
a- Liver and duodenum.
b- Duodenum and pancreas.
c- Salivary glands and liver.
d- Pancreas and salivary glands.
e- Large intestine and liver.

14- Which of the following carries out chemical digestion?
a- Insulin.
b- Gastrin.
c- Trypsin.
d- Secretin.
e- Cholecystokinin.



15- An example of absorption is the……………
a- movement of food by peristalsis.
b- active transport of glucose into a villus.
c- hydrolysis of a peptide into amino acids.
d- release of secretin in the presence of HCl.
e- transmission of food from mouth to stomach.

16- The presence of large numbers of mitochondria in the cells lining the small intestine allows it to……….
a- release HCl.
b- produce bile.
c- absorb glucose.
d- synthesize vitamins.
e- secrete salivary amylase.

17- A patient complains of a burning sensation in the chest. This was found to be caused by gastric juice in the esophagus. The structure most likely not functioning properly is the……………
a- pharynx.
b- epiglottis.
c- pyloric sphincter.
d- cardiac sphincter.
e- ilium.

18- Chewing food aids digestion by………………….
a- stimulating the release of bile.
b- increasing the surface area of the food.
c- breaking up large protein molecules into peptides.
d- completing the chemical breakdown of carbohydrates.
e- stimulating the release of HCL.

19- Which of the following describes peristalsis?
a- the physical breakdown of fats.
b- production of vitamins by E. coli.
c- breaking up large protein molecules into peptides.
d- muscle contractions of the digestive tract.
e- release of enzymes by the pancreas.
20- Which of the following structures prevents food from entering the trachea?
a- Larynx.
b- Pharynx.
c- Pyloric sphincter.
d- Cardiac sphincter.
e- Epiglottis.

21- A role of hydrochloric acid in the stomach is to……………..
a- kill bacteria.
b- hydrolyze fat.
c- digest protein.
d- activate trypsin.
e- digest starch.


22- Sodium bicarbonate ( NaHCO3 ) in pancreatic juice………
a- kills bacteria.
b- emulsifies fats.
c- activates pepsin.
d- neutralizes acid chyme.
e- stimulates the release of insulin.

23- Which of the following is not a function of pancreatic juice?
a- Raising pH.
b- Emulsifying.
c- Starch digestion.
d- Protein digestion.
e- Neutralizing acid chyme.




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MCQs on GIT physiology with their answers
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