Question

Write one function of each of the following components of the digestive system in human beings: (a) Pepsin (b) Liver (c) HCI​

Answer 1

Answer:

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(a) (i) Saliva: Watery substance, which produced in the mouth. It contains electrolytes, mucus antibacterial compounds and enzyme.

(ii) HCL: It breakdown digest and absorb nutrients such as protein. It also eliminates virus and bacteria in the stomach, products body from infection.

(iii) Bile-Juice: It is a dark green yellowish-brown fluid produced by the liver.

(iv) Villi: These structures present in the small intestine, they help in absorbing digested food, these structures look like small fingers.

(b) (i) Pepsin: It is an enzyme produced by the stomach cells. It aids in break down of proteins as it is a proteolytic enzyme.

(ii) Lipase: Lipase is an enzyme secreted by the pancreas it aids in the digestion of fat.

Answer 2

Functions :

Pepsin - It converts proteins to proteases and peptones(peptides).

Liver - It releases bile which help in emulsification of fats. Bile also activates lipases.

HCl - It provides the acidic pH optimal for pepsins.