Immune system

Q.

Assertion (A): Skin provides innate immunity to the body.

Reason (R): Skin has mucous membrane which does not allow the pathogen to enter our body.

1. Both A and R are true and R is the correct explanation for A.

2. Both A and R are true, but R is not the correct explanation for A.

3. A is true and R is false.

4. A is false and R is true.

Q. Which is the First and second line of Defence in the immune system?

Q. A person having once suffered from measles will not normally suffer from it again. This is because of

1. Specific immunity
2. Non- specific immunity
3. Passive immunity
4. Actively acquired immunity

Q.

Describe types of immunity. [3 MARKS]