Which of the following examples below describes an autoimmune disease?

a) infection and death of t- cells by a virus, resulting in a loss of adaptive immunity.
b) release of bacterial endotoxins that block acetylcholine release result in muscle paralysis.
c) antibody binding to acetylcholine receptors of the motor end plate resulting in muscle weakness.
d) uncontrolled cell division resulting in cell surface abnormalities recognized by nk cells.

The correct answer is: C) Antibody binding to acetylcholine receptors of the motor end plate resulting in muscle weakness.

Simply saying, autoimmune diseases are diseases caused by the attack of your own cells by your immune cells. Autoimmune diseases are consequence of an abnormal immune response to a normal cell with unknown cause. In the example above, antibodies that are part of the humoral immune response attack receptors of the motor end which are normally functioning structures of the cell.

There are many types of autoimmune diseases such as rheumatoid arthritis, multiple sclerosis, lupus, diabetes mellitus type 1…