hot environment causes the body to sweat

Exposure to a hot environment causes the body to sweat. The hotter the environment, the greater the sweating. Two anatomy and physiology students are arguing about the mechanisms involved. Student A claims that they are positive feedback and student B claims they are negative feedback. Do you agree with student A or student B, and why? Through sweating, the body is able to cool off and regulate its normal temperature which is 370c. I agree with student B. When our skin is exposed to high temperatures, it reduces the set point of sweating and creates a negative feedback mechanism. Negative feedback mechanisms are found in the regulation of internal body temperature control, blood pressure, pH, water balance, glucose levels, and heart rate (Hudson, 2005). The body systems involved are the brain where the hypothalamus plays the role of receiving the message that body temperature has deviated from the normal. It sends messages to other organs including the blood vessels of the skin so that temperature can return to normal. The vessels dilate and blood flows closer to the skin, giving off excess heat. Sweating is usually activated where the action of the blood vessels is not enough to bring the body temperature back to its normal state. If the opposite were to happen and one is exposed to cold temperatures, a negative feedback mechanism would be involved in restoring body temperature. Positive feedback mechanism usually involves a greater change from the normal and is seen during child birth and in reproduction and blood clotting (Marieb, 1989). This is where student A is wrong. Homeostasis can only be maintained through negative feedback. Carbon dioxide that accumulates in the blood can become toxic, in part because it alters the blood pH. Some of the carbon dioxide molecules react with water to form carbonic acid (CO2 + H2O ó H2CO3). Ned can swim across the swimming pool under water. Before diving into the water, he breathes rapidly for a few seconds, and while h...