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.
A disease is an abnormal condition affecting the body of an organism. There are four main types of disease: pathogenic disease, deficiency disease, hereditary disease, and physiological disease.Pathogenic diseases are caused by what is called a pathogen. Pathogens are parasitic organisms that cause disease in their host.For example the pathogen e.coli which can make people ill or kill them. Deficiency diseases are caused by a deficiency of a particular nutrient in the diet.A lack of vitamin c causes scurvy. Hereditary diseases are passed on through generations via their genes, for example sickle cell disease.hysiological diseases such as diabetes can be treated by: Diet-a healthy diet is key to controlling blood sugar levels and preventing diabetes complications. Exercise-regular exercise can reduce the risk of developing complications of diabetes such as stroke and kidney failure.