By Antibodies and Plasma cells
When homeostasis is not maintained, the body cannot function properly and illness may ensure.<span> Homeostasis is the process in which the body's overall internal environment is kept constant in response to any external environmental changes.</span>
This is a very general question. There are many diseases that cause this. Some that I can think of are Parkinson’s disease, Huntington’s disease, and cerebral palsy.
