Stress is simply a reaction to a stimulus that disturbs our physical or mental equilibrium.
Stress is a physical, mental and emotional response to a challenging event — not the event itself. Often referred to as the fight-or-flight response, the stress response occurs automatically when you feel threatened. Definition. Stress is defined as an organism's total response to environmental demands or pressures. When stress was first studied in the 1950s, the term was used to denote both the causes and the experienced effects of these Stress. Stress is simply a reaction to a stimulus that disturbs our physical or mental equilibrium. In other words, it's an omnipresent part of life. A stressful event can trigger the “fight-or-flight” response, causing hormones such as adrenaline and cortisol to surge through the body. Medical Definition of STRESS. 1. a: a force exerted when one body or body part presses on, pulls on, pushes against, or tends to compress or twist another body or body part; especially: the intensity of this mutual force commonly expressed in pounds per square inch b: the deformation caused in a body by such a force. 2. Stress: In a medical or biological context stress is a physical, mental, or emotional factor that causes bodily or mental tension. Stresses can be external (from the environment, psychological, or social situations) or internal (illness, or from a medical procedure). Stress can initiate the fight or flight response, a complex reaction of neurologic and endocrinologic systems. Catecholamine hormones, such as adrenaline or noradrenaline, facilitate immediate physical reactions associated with a preparation for violent muscular action.
http://www.mayoclinic.org/tests-procedures/stress-management/basics/definition/PRC-20021046 http://medical-dictionary.thefreedictionary.com/stress https://www.psychologytoday.com/basics/stress http://www.merriam-webster.com/medical/stress http://www.medicinenet.com/script/main/art.asp?articlekey=20104
define stress