Immune Response

A person injured in a road accident and requiring and urgent immune response was brought to a doctor. (a) What did the doctor immediately do? (b) What kind of an immunity was he providing to the patient. (c) Define this kine of immunity.

Which of the following hormones produces anti-inflammatory reactions, suppresses immune response, stimulates RBC production and is also involved in maintaining cardiovascular system and kidney functions?

Differentiate between the roles of B-lymphocytes and T-lymphocytes in generating immune responses. OR Principle of vaccination is bassed on the property of "memory" of the immune system. Taking one suitable example, justify the statement.

Assertion : Lymph is a colourless fluid containing specialised lymphocytes which are responsible for the immune responses of the body. Reason : Exchange of nutrients, gases etc., between the blood and the cells always occur through this fluid.

A type of granulocyte and agranulocyte (i) are phagocytic cells that destroy foreign organisms entering the body. (ii) secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. (iii) resist infections and are also associated with allergic reactions. (iv) are responsible for the immune responses of the body.

Read the following statements about acquired immunity. Which of the following statements are correct ? I. Acquired immunity is a non - specific type of immunity . II. The primary and secondary immune responses are carried out with the help of lymphocytes present in our blood. III. Each antibody molecules has two smll heavy chains and two longer light chains respectively. IV. Cell - mediated immunity is mediated by T - lymphocytes.

Antibody. I. is a protein molecule II. Is synthesised by an animal to combat foreign material. III. Occur on the surface of a plasma cell and also in the body fluids. IV. Binds to a macrophage to reach a helper T-cell to intiate immune response. Codes