موضوع: 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.
الإثنين أكتوبر 03, 2011 6:45 am
