After a particularly strenuous workout, Javon feels especially good. Javon's euphoria may reflect the release
of the brain's natural painkiller called:
dopamine.
glutamate
endorphins.
serotonin

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.