Question

Choose the correct answer among the following:

(a) Gastric juice contains

(i) pepsin, lipase, and rennin

(ii) trypsin, lipase, and rennin

(iii) trypsin, pepsin, and lipase

(iv) trypsin, pepsin, and renin

(b) Succus entericus is the name given to

(i) a junction between the ileum and large intestine

(ii) intestinal juice

(iii) swelling in the neck

(iv) appendix

Answer 1

• Gastric juice contains pepsin, lipase, and rennin. Pepsin is secreted in an inactive form as pepsinogen, which is activated by HCl. Pepsin digests proteins into peptones. Lipase breaks down fats into fatty acids. Rennin is a photolytic enzyme present in the gastric juice. It helps in the coagulation of milk.
• Intestinal juice :

Succus entericus is another name for intestinal juice. It is secreted by the intestinal gland. Intestinal juice contains a variety of enzymes such as maltase, lipases, nucleosidases, dipeptidases, etc.