(A) An autoimmune disease occurs when the immune system loses the ability to distinguish between 'self' and 'non-self' cells. As a result,the body's i

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The body attacks its own cells.

(A) An autoimmune disease occurs when the immune system loses the ability to distinguish between 'self' and 'non-self' cells. As a result,the body's immune system mistakenly attacks its own healthy cells,tissues,or organs. Examples include Rheumatoid arthritis and Myasthenia gravis.

Class 12 Biology Human Health and Disease Immunity

Medium

In an autoimmune disease,.........

A
The body attacks its own cells.
B
Antigens attack antibodies.
C
The immune system shows an excessive response.
D
Antibodies attack pathogenic organisms.

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Chapter

Human Health and Disease

Subtopic

Immunity

Match the columns:

Column-$I$ Column-$II$

$(a)$ Physical barrier $(1)$ Skin

$(b)$ Physiological barrier $(2)$ Interferon protein

$(c)$ Cellular barrier $(3)$ Leucocytes

$(d)$ Cytokine barrier $(4)$ Saliva in the mouth

Column-$I$	Column-$II$
$(a)$ Physical barrier	$(1)$ Skin
$(b)$ Physiological barrier	$(2)$ Interferon protein
$(c)$ Cellular barrier	$(3)$ Leucocytes
$(d)$ Cytokine barrier	$(4)$ Saliva in the mouth