Question

1. What in an antigen?

2. What are the main differences between innate and adaptive immunity?

3. What are the three lines of defense? State their function and give examples of each one.

4. What is humoral immunity? Which cells are involved in humoral immunity?

5. What is an antibody? Which cell produces it?

6. What is cell-mediated immunity?

Answer 1

Question No.1

Answer :- Antigen May be defined as foreign substance that are recognized by the immune system and activate immune system by binding to antigen-specific receptors.

Question No.2

Answer : The main difference between innate and adaptive immunity is given below .

innate immunities is general and are non-specific immune response which is  activated by anything that is not "self" while Adaptive immunity is a specific type and tailored response that is based on the specific pathogen when enter inside the body .

Question No.3

Answer :- First line of defense Includes tears from eye ,sweat from skin , skin, mucus, stomach acid and  hair.

Second line of defense Includes general WBC, inflammatory defense, specialized proteins .

Third line of defense Includes Immunity - lymphocytes originate in bone marrow and are stored in lymph nodes.

Question No.4

Answer :- Hunoral antibodies are the branch of adaptive immunity mediated by antibodies produced by B cells of antibodies .It is the principal defense against extracellular pathogens.

B lymphocytes are involved in humoral immunities .

Thanks