The pH optimal for pepsin is:
1. 1.8
2. 3.8
3. 6.8
4. 7.8
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The proenzyme pepsinogen gets converted into the active enzyme pepsin on exposure to:
1. HCl
2. Enterokinase
3. Enterogastrone
4. Bile
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The opening of the stomach into the duodenum is guarded by:
1. Cardiac sphincter
2. Sphincter of Oddi
3. Pyloric sphincter
4. Ileocaecal sphincter
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Which of the following would not be classified as an accessory digestive gland?
1. Liver
2. Crypts of Lieberkuhn
3. Pancreas
4. Salivary glands
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In jaundice, skin and eyes turn yellow due to the deposition of:
1. Bile salts
2. Carotenoids
3. Xanthophylls
4. Bile pigments
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Chylomicrons are:
1. | small protein coated fat globules formed in the intestinal epithelium |
2. | small protein coated fat globules formed in the lacteals of the villi |
3. | small fat coated protein globules formed in the intestinal epithelium |
4. | small fat coated protein globules formed in the lacteals of the villi |
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Diarrhoea is most likely to affect most the process of:
1. Ingestion of food
2. Passage of food through the upper alimentary canal
3. Digestion of the food in the large intestine
4. The absorption of food
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Carbohydrates in the chyme are hydrolysed into disaccharides by:
1. Salivary amylase
2. Pancreatic amylase
3. Gastric amylase
4. Intestinal amylase
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The causes of indigestion include all except:
1. parasympathetic stimulation
2. anxiety
3. food poisoning
4. eating spicy food
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The mucus and bicarbonates present in the gastric juice play an important role in:
1. providing an alkaline medium for enzyme action.
2. lubrication and protection of the mucosal epithelium from excoriation by the highly
concentrated hydrochloric acid.
3. converting the bolus into a paste like chyme.
4. providing an acidic medium for enzyme action.
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