Question

explain the importance of the following: villi, pepsin, salivary amylase, mucus and RBC​

Answer 1

Answer:

1). villi

Villi are tiny, finger-like projections from the wall of the small intestine. They line the inner surface of the small intestine. Their role is to increase the surface area within the small intestine. This will lead to the increase of the surface area of absorption as it is the main function of the small intestine.

2) pepsin

Pepsin is a stomach enzyme that serves to digest proteins found in ingested food. Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach.

3) salivary amylase

CARBOHYDRATES | Digestion, Absorption, and Metabolism

Salivary amylase is probably important in initiating starch digestion, depending upon the time spent chewing. Human salivary amylase is 94% identical with pancreatic amylase, but is inactivated in the acid pH of the gastric lumen.

4) mucus

The mucins in mucus can work as a selective barrier, lubricant, or viscous material depending on their structure. When mucin structure and production is normal, mucus protects surfaces all over our body, which helps us live alongside many different microbes.

5) RBC

Red blood cells carry oxygen from our lungs to the rest of our bodies. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.

Explanation:

Hope it is helpful..

Answer 2

(a) Salivary amylase:

It’s an enzyme present in the saliva, secreted by salivary glands. It digests starch into maltose there by starting the digestion of carbohydrate in the buccal cavity.

(b) Villi:

They increase the surface area for absorption of digested food into the blood.

(c) Pepsin:

It is a digestive enzyme secreted by gastric glands. It is responsible for the digestion of proteins in stomach.