Which of the following statements are CORRECT? I. Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins. II. No significant digestive activity occurs in the large intestine. III. The egestion of faeces to the outside through the anal opening (defaecation) is a voluntary process and is carried out by a mass peristaltic movement. IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting centre in the medulla.

Question

Which of the following statements are CORRECT? I. Renin is a proteolytic enzyme found in gastric juice of infants which helps in the digestion of milk proteins. II. No significant digestive activity occurs in the large intestine. III. The egestion of faeces to the outside through the anal opening (defaecation) is a voluntary process and is carried out by a mass peristaltic movement. IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting centre in the medulla., I, II and IV, II, III and IV, III and IV, II and III

MARKS App · Accepted Answer

Stomach consists of proteolytic enzymes that bring about digestion of proteins. In infants there is an additional milk protein digesting enzyme known as Rennin. This digests milk protein Casein which is absent in adults. (Renin is another hormone from kidney that plays an important role in maintaining the blood pressure). Digestion in humans begin in the mouth and ends in the small intestine. Ejection of faeces is known as defaecation which is a voluntary process. If stomach contents instead of entering the small intestine enter the oesophagus this is termed as vomiting.

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