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Human Health and Disease

Long Answer Type

41. Write name of causative agent of pneumonia. List symptoms and modes of transmission.

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Short Answer Type

42. What is Immune system ? Mention the two types (components) of immune system.

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43. Briefly describe the cells of the immune system.

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Long Answer Type

44. Distinguish between B-cells and T-cells.

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Short Answer Type

45. Write structure of antibody (Immunoglobulin) molecule.

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46. Give the name and functions of four classes of antibodies.

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Long Answer Type

47.

How B-cells respond to antigens?

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Short Answer Type

48.

How T-cells respond to antigens?

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49. Differentiate antibodies and interferons.

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50. What is autoimmunity ? Explain.

Autoimmunity is the condition when the immune system of the body starts attacking self cells resulting in the damage of the body. In autoimmunity the immune system turns against the cells of the body and desrtoys them. For eg Rheumatoid arthritis is an auto-immune disease in which the cells in the joints are destroyed.

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