2.77b Thermoregulation

1. In humans we must maintain a constant temperature - 38-37 C. In order for this to work our receptors, the Hypothalamis, responds to the stimulus, the temperature of blood, and if there is need for change then the skin will change the temperature.
2. The response will be either an increase or decrease in body temperature. Feedback to hypothalamis and based on new input, new output produced.
3. Major component of skin - Sweat glands and capillary network. Allows blood to move closer or further away to the skin.
4. Stimulates cooling which involves sweating and the bloodflow to the surface of the skin increases. Dilated blood vessels. Increases exchange of heat like radiation and evaporation.
5. Stimulates heating, which involves shivering, raised hairs. reduces heat exchange with the external environment. Vary UP and DOWN around the fixed point