Answer to Question #25383 in Biology for musthafa

We feel relax by the air of a fan, because with airflowevaporation of water from the body is increased, resulting in the concentrationof K ⁺ and Na ⁺ in the cell remains unchanged and outside the cell concentration increases, so the potential difference grows on the membrane and rises the threshold of activation. As the relaxation - it is the decrease of muscle tone, so not all nerve impulses that come to the muscles, can overcome the threshold of activation, which leads to a reduction of a muscle tone - relaxation.