Why does an increase in metabolic rate result in more water loss through evaporation?
Simplistic answer – Increased metabolic rate = increased energy usage = increased heat ouput. It’s not quite as simple as that though. An increased metabolic rate generally means the organs are also performing at an improved rate. The pores breath and exhale, your actual breath rate is also increased. Blood “should” flow through in greater volume delivering more energy to support the increased metabolic rate. The delivery medium for the enrgy is blood. Blood is composed of water. Increased sweat, increased processing of blood through kidneys, increased breath rate should all add up to more water loss through the natural process of heat exchange with the environment. Hence the issues of hypothermia when there’s not enough and heat prostration when there’s too much.
