Guest guest Posted March 26, 2006 Report Share Posted March 26, 2006 Lil writes: " Epinephrine plays a central role in the short-term _stress_ (http://en.wikipedia.org/wiki/Stress_(medicine)) reaction-the physiological response to threatening or exciting conditions (see _fight-or-flight response_ (http://en.wikipedia.org/wiki/Fight-or-flight_response) ). It is secreted by the _adrenal medulla_ (http://en.wikipedia.org/wiki/Adrenal_gland) . When released into the bloodstream, epinephrine binds to multiple _receptors_ (http://en.wikipedia.org/wiki/Receptor_(biochemistry)) and has numerous effects throughout the body. It increases _heart rate_ (http://en.wikipedia.org/wiki/Heart_rate) and (heart irritability) _stroke volume_ >> Ye Gods and Little Fishes, when I highlighted this from a Web site and pasted it into my post, it had none of these wikipedia references; however it did have links, my bad, sorry. The simple answer is epi's stimulate the heart and raise the heart rate. Lil Quote Link to comment Share on other sites More sharing options...
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