PSICOLOGÍA5: ANGER (state of being mad, annoyed). Anger is an emotion. The physical effects of anger include increased heart rate, blood pressure, and levels of adrenaline and noradrenaline.[1] Some view anger as part of the fight or flight brain response to the perceived threat of harm.[2] Anger becomes the predominant feeling behaviorally, cognitively, and physiologically when a person makes the conscious choice to take action to immediately stop the threatening behavior of another outside force.[3] The English term originally comes from the term angr of Old Norse language.[4] Anger can have many physical and mental consequences.