Homeostasis. The biological definition of homeostasis is âthe tendency of an organism or cell to regulate its internal environment and maintain equilibrium, usually by a system of feedback controls, so as to stabilize health and functioningâ.ositive feedback mechanisms. A positive feedback mechanism is the exact opposite of a negative feedback mechanism. With negative feedback, the output reduces the original effect of the stimulus.
Bacteria produce disease in one of two general ways; some bacteria damage the cells and tissues of the infected organism directly by breaking down the cells for food, other bacteria release toxins (poisons) that travel throughout the body interfering with the normal activity of the host. Pathogens.
Once you are infected bacteria grow and reproduce inside the cells of your body. As they grow and divide, many bacteria make toxins (poisons). These toxins can damage your cells. Some bacteria damage your cells directly as they grow.Disease symptoms such as a high temperature, headaches and rashes can be caused by the damage and toxins or by the way your body responds to the damage and toxins produced by the bacteria.n this way they direct your cells to make copies of the virus until eventually the cell bursts, releasing many more viruses to infect other cells. In this way viruses kill infected cells, spread and damage body tissues. The way your body responds to the bursting of the cells causes the symptoms of the disease.