Give other examples of disturbances in the internal environment that can act as a stimulus to a feedback mechanism.
An example of a positive feedback mechanism would be blood clotting. Once a person is wounded, their body releases chemicals that call on platelets to attach themselves to the wounded area. After attaching themselves to the wounded area, the platelets attract more platelet to form a blood clot. On the other hand, an example of a negative feedback mechanism would be the temperature regulation of the body. The body has a regular temperature of 37.5 degrees Celsius so when it increases or decreases the body needs to reverse the change to maintain homeostasis. If the body temperature decreases, the brain sends signals to the blood vessels and muscles: the blood vessels constrict to decrease blood flow which minimizes heat loss, and the muscles shiver to generate heat. If the body temperature increase, the brain sends signals to the blood vessels and glands: blood vessels dilate to allow more heat to be released, and sweat glands are activated to produce sweat that gives a cooling sensation.