Chemistry of Fear and Fright

Air Date: 10/27/2011
15 seconds preview, please or for full videos.


This NBC Learn video explains what fear is, chemically: a series of responses in the brain and body -- including an increase in heart and respiratory rates, blood pressure, and perspiration -- after release into the bloodstream of two hormones, adrenaline and cortisol, that ready the body for "fight or flight" action.