After you exercise for a while, you may notice that your skin turns red? how is the blood flow in your limb changes as a response to the exercise? when your skin turns red, how is the temperature changed at the skin surface (tskin)? if the total heat loss from the skin surface to the environment is ha(tskin-tar), during exercise, is the total heat loss to the air increased or decreased? is it reasonable? here h is convection coefficient at the skin surface. a is the skin surface area. tair is the air temperature. neglect sweating (hint: during exercise, the total heat generated per unit time by the body increases significantly. if all the generated heat has to escape from the skin surface, then heat loss from the skin surface to the environment also increases during exercise.