Changes

'''Stress''' is a [[Biology|biological]] term which refers to the consequences of the failure of a [[human]] or animal [[body]] to respond appropriately to [[emotion]]al or [[body|physical]] threats to the organism, whether actual or imagined.  It is "the [[autonomic]] response to environmental [[stimulus]]."

'''Stress''' is a [[Biology|biological]] term which refers to the consequences of the failure of a [[human]] or animal [[body]] to respond appropriately to [[emotion]]al or [[body|physical]] threats to the organism, whether actual or imagined.  It is "the [[autonomic]] response to environmental [[stimulus]]."

It includes a state of alarm and [[adrenaline]] production, short-term resistance as a coping mechanism, and exhaustion. It refers to the inability of a human or animal body to respond.  Common stress symptoms include irritability, muscular tension, inability to concentrate and a variety of physical reactions, such as headaches and elevated heart rate.<ref> Stress can occur in a variety of methods, including anxiety. Anxiety is a form of stress but may have diffrent symptoms, and diffent bodily reactions.[http://www.ehealthmd.com/library/stress/STR_whatis.html EHealthMD: What is stress] Retrieved September 3, 2008.</ref>

It includes a state of alarm and [[adrenaline]] production, short-term resistance as a coping mechanism, and exhaustion. It refers to the inability of a human or animal body to respond.  Common stress symptoms include irritability, muscular tension, inability to concentrate and a variety of physical reactions, such as headaches and elevated heart rate.<ref> Stress can occur in a variety of methods, including anxiety. Anxiety is a form of stress but may have diffrent symptoms, and diffent bodily reactions.[http://www.ehealthmd.com/library/stress/STR_whatis.html]

==Origin and terminology==

==Origin and terminology==