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.
Before we go into the details of how does bacteria cause diseases, it is important to understand the difference between 'infection' and 'infectious disease'. When an organism is able to lodge itself in or the tissue of the host and multiply, it is called an infection. However, not every infection leads to a disease.o, not all bacteria cause diseases. You will be surprised to know, less than 1% bacteria have the ability to cause diseases. There are a few beneficial bacteria that help plants, animals as well as humans in various ways.