fight or flight response. what is the mechanism?
91844
When we perceive an immediate danger, our brain processes incoming signal and sends a message to the whole body to mobilize resources for defense ("fight") or retreat ("flight"). The major recipient of these brain signals are adrenal glands, which secrete hormone epinephrine (adrenalin). Adrenalin is released into blood stream, binds to its receptors on various cells and initiates a  "launch" sequence: it makes liver to release glucose into blood, it elevates heart rate and increases blood pressure, diverts blood flow from at the moment non-essential organs (like digestive tract) to muscles etc. It happens in the matter of seconds, so the individual becomes ready to face or evade the incoming danger.
338853
Flying dishes go through space very quickly when someone is angry!\nCould you rephrase that question?
252974
Adrenaline (epinephrine) causes the pupil to dilate and the upper eyelid to raise a little bit more.  This is considered an evolutionary benefit in the "fight or flight" phenomenon as it helps seeing while you are fighting/running.
212381
What are you asking about these reactions?
334673
i think it has something to do with a "flight or fight" syndrome. like when you get startled. except when you are nervous, you know there is no need to run and you really have no need to fight, so therefore, you laugh. some people stutter or get flustered, you laugh. nothing wrong with it, just maybe say excuse me, im a little nervous. if you are feeling pressure, explain that the person is making you uncomfortable and could they please back off.
846551
Adaptation of flight.
1049686
He is asking for mechanism....Mechanism is how it works. This is a phase equilibria problem. Please refer to A Level option booklet of phase equilibria.
182745
Blushing is a unique blend of evolutionary and social behavior. It's an involuntary reaction of the sympathetic nervous system, which is responsible for our "fight or flight" response, but blushing is solely triggered by social cues. \nPeople generally blush when they're feeling embarrassed, scared, or stressed. As a result of the "fight or flight" response, the capillaries that carry blood to the skin widen, and the increased blood flow lends the face, as well as sometimes the chest, neck, or even the body or legs, a reddened color. \n\nExcessive facial blushing, or erythrophobia, is caused by overactivity of the sympathetic nervous system. The condition can cause a lot of psychological duress and has engendered several support groups. \n\nIt's common knowledge that animals don't blush. So while there are some evolutionary cues behind blushing, it's also linked to something uniquely human -- moral consciousness. \n\nHope that helps x
789370
Probably compensation for an unnatural move...it doesn't feel right, so your body tries to compensate for it.
171054
why is the reason.\nwhat is the action.
743217
Depends on the situation. Most of the time I just jump off and build my wings on the way down
886155
It uses electrical impulses.\nI do argue a lot with my brain, as it does have a mind of it's own.
351086
I kind of had a hard time understanding the last part of the question, but I tried to answer anyway.\n\nThe Sympathetic Nervous System (SNS) is also called the "fight or flight" system. It helps the body cope with emergency situations where it might have to defend itself (fight) or escape (flight). It causes increased heart rate, bronchodilation (your airways to get smaller), shaking, dry mouth, and blood to go to the skeletal muscle (muscle we use voluntarily).\n\nAs for the gastrointestinal tract, it will slow or completely stop digestion and defecation (pooping). Like I said before, you have an increased heart rate, and most of the blood goes to your skeletal muscle (the SNS is getting the body ready to fight or run). This is why people look pale; a majority of the blood has gone away from their skin into the muscles. Since most of the blood is in the muscles, and the SNS almost stops the GI tract, there is very little blood flow to the gastrointestinal tract when your sympathetic nervous system is heightened. Normal blood flow is resumed when you are calmed down.\n\nI hope this helps!
405351
Fight and Flight: Cardiac arrest resuscitation.
999054
Release of tension and frustration, especially if it took a while to get in touch with an actual person.\nMost of these people end up apologizing either before of after they let it fly.
1163348
You might be taking the phrase a bit too literally, because if you want to literally do this, you might have to knock off all the controls and instruments in a modern aircraft!\n\nBefore airplanes had sophisticated instruments and flight control systems, and even today, planes are piloted by feel. Pilots can feel the reactions of the plane in response to their actions at the controls.\n\nBeing the largest point of contact between pilot and plane, most of the feel or feedback comes through the seat of the pants.\n\nIf you are "flying by the seat of your pants" your are responding to the feedback received.
553753
well i am a repo man ex cage fighter....fighting is never the answer...however...if you get cornered and your back is against the wall and you feel you have to fight to get out..then hit them as hard as you can right in the nose...and keep punching...this is the element of surprise...usually the first person to hit is the winner...dont give up and never back down untill he says ok or gives up first