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.
Bacteria cause disease. Most of these bacteria, like those listed below make their presence felt immediately and may or may not result in death. Some people though, can be infected with a bacterium that normally causes a disease and not show any harmful effects at all, people like this are called carriers.he pathogenicity of invasive bacteria, or their ability to cause disease is generally the result of toxins. Substances produced by the bacterial cell, sometimes simply as a by-produce of its normal metabolism, which interact negatively with our body, by interfering with the normal functioning.