Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Discussion During exercise, metabolism and heat production processes in the body increase significantly. Yet, body core temperature remains almost unchanged. The body balances the amount of heat produced during the exercise by losing the same amount of heat, to it's surroundings. More than 80% of the heat is lost through the skin's surface while less than 20 % is actually used to drive your muscles. Blood vessels near the surface of the skin dissipate heat. Therefore heat loss is effectively achieved by an increase in blood flow in the skin, where sweat is evaporated to cool your body. This process is called vasodilation/evaporation cooling Sweating is controlled by the temperature of the blood flowing to the part of the brain called the hypothalamus. When your temperature rises, you sweat more. During exercise, your heart beats rapidly to pump blood to bring oxygen to muscles and hot blood from muscles to the skin where...

To see the full version of this document, and 145,841 others