Question

Q.5 Match the following.
Column 1 Column II
9. AIDS
i. Antibody production
b. Lysozyme ii. Activation of B-cells
c. B-cells
iii. Immunoglobulin
d. T-helper cells iv. Tears
e. Antibody v. Immuno deficiency​

Answer 1

Answer:

AIDS - immuno deficiency

lysozyme- immunoglobulin

B- cells- activation of B- cells

T- helper cells- Tears

Antibody- antibody production

Answer 2

Answer:

a.AIDS                 →  Immunodeficiency

b.Lysozyme         → Tears

c.B-cells               →  Antibody Production

d.T-helper cells    → Activation of B-cells

e.Antibody           →  Immunoglobulin

Explanation:

a)AIDS or acquired immune deficiency syndrome is a disease caused by HIV. This virus weakens the immune system of the infected person and he is too weak to fight any kind of infection

b)Lysozyme is an enzyme found in the body secretions such as tears and saliva.

• It functions as an antimicrobial agent that breaks down the bacterial cell wall and provides protection against bacterial invasion in the skin, mucus membrane, and eyes.

c)B-cells, which mature in the bone marrow, are responsible for antibody-mediated immunity i.e B cells produce antibodies.

d)T-helper cells are responsible for cell-mediated immunity i.e T cells destroy infected cells.

• T cells originate in the bone marrow and mature in the thymus.
• As soon as the foreign antigen enters the cells, T cells trigger the B cell to develop plasma cells and activate T killer cells.

e)Antibody (Ab) is also known as an immunoglobulin.

• These are large, Y-shaped blood proteins produced by plasma cells.
• They bind to foreign particles and invade them.