Adrenergic, Did You Say?

When you've got the adrenergic system, there's a whole bunch of receptors that adrenaline combine to. So alpha one is generally located on blood vessels; beta three is in fat cells. When you throw adrenaline at them, they stimulate the tissues that they're located on to do their function,. If you throw it onto the twos,alpha two and beta two, it triggers those tissues to stop doing their function.