The proenzyme pepsinogen gets converted into the active enzyme pepsin on exposure to:
1. HCl
2. Enterokinase
3. Enterogastrone
4. Bile
The opening of the stomach into the duodenum is guarded by:
1. Cardiac sphincter
2. Sphincter of Oddi
3. Pyloric sphincter
4. Ileocaecal sphincter
Which of the following would not be classified as an accessory digestive gland?
1. Liver
2. Crypts of Lieberkuhn
3. Pancreas
4. Salivary glands
In jaundice, skin and eyes turn yellow due to the deposition of:
1. Bile salts
2. Carotenoids
3. Xanthophylls
4. Bile pigments
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 |
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
Carbohydrates in the chyme are hydrolysed into disaccharides by:
1. Salivary amylase
2. Pancreatic amylase
3. Gastric amylase
4. Intestinal amylase
The causes of indigestion include all except:
1. parasympathetic stimulation
2. anxiety
3. food poisoning
4. eating spicy food
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.
The egestion of faeces to the outside through the anal opening (defaecation) is:
1. a voluntary process and is carried out by a mass peristaltic movement.
2. an involuntary process and is carried out by a mass peristaltic movement.
3. a voluntary process and is carried out by an anteperistaltic movement.
4. a voluntary process and is carried out by a peristaltic movement.