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.
Antibiotics work against bacteria. An antibiotic is given for the treatment of an infection caused by bacteria. They target only bacteria-they do not attack other organisms, such as fungi or viruses.If you have an infection it is important to know whether it is caused by bacteria, and not a virus or fungus.Most upper respiratory tract infections, such as the common cold and sore throats are generally caused by viruses-antibiotics do not work against viruses. Antibiotics kill living things like bacteria.ntibiotics work against bacteria. An antibiotic is given for the treatment of an infection caused by bacteria. They target only bacteria-they do not attack other organisms, such as fungi or viruses.