Question

Which of the following are the reason(s) for Rheumatoid arthritis? Choose the correct option.

i.The ability to differentiate pathogens or foreign molecules from self cells increases

ii.Body attacks self cells

iii.More antibodies are produced in the body

iv.The ability to differentiate pathogens or foreign molecules from self cells is lost

• A. ii and iv
• B. i and ii
• C. i and iii
  
• D. iii and iv

Answer 1

The correct option is A ii and iv

Property of immune system:

Immune system has the ability to distinguish between self and non-self molecules. Whenever the immune cells come in contact with the antigen (usually foreign body), it attacks to eliminate the antigen by producing antibodies. Along with this, memory cells are produced which can recognise similar antigens during second and subsequent exposures.

Rheumatoid arthritis:

Rheumatoid arthritis is an autoimmune disease in which the body is not able to recognise its own cells and starts producing antibodies against healthy cells. It manifests in the form of swelling and pain in the joints.


Final answer (b) ii and iv