Science (English Medium) Class 11 - CBSE Question Bank Solutions

Explain essential elements with examples.

Choose the correct answer among the following:

Gastric juice contains

 (i) pepsin, lipase and rennin

 (ii) trypsin lipase and rennin

 (iii) trypsin, pepsin and lipase

 (iv) trypsin, pepsin and renin

Choose the correct answer among the following:

Succus entericus is the name given to

(i) a junction between ileum and large intestine

(ii) intestinal juice

(iii) swelling in the gut

(iv) appendix

Match column I with column II

How does pepsinogen change into its active form?

Answer briefly:

How does bile help in the digestion of fats?

Describe the process of digestion of protein in stomach.

Bile juice contains no digestive enzymes, yet it is important for digestion. Why?

Describe the digestive role of chymotrypsin. What two other digestive enzymes of the same category are secreted by its source gland?

How are polysaccharides and disaccharides digested?

What would happen if HCl were not secreted in the stomach?

How does butter in your food gets digested and absorbed in the body?

Name different types of teeth and their number in an adult human.

What is the significance of vital capacity?

State the volume of air remaining in the lungs after a normal breathing.

Find out the Tidal volume (approximate value) for a healthy human in an hour.

Distinguish between IRV and ERV.

Distinguish between inspiratory capacity and expiratory capacity.

Distinguish between Vital capacity and Total lung capacity.

Give a brief account of the counter current mechanism.