fight-or-flight response

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fight-or-flight response

(fīt′ôr-flīt′)
n.
A set of physiological changes, such as increases in heart rate, arterial blood pressure, and blood glucose, initiated by the sympathetic nervous system to mobilize body systems in response to stress.

fight-or-flight response

Flight-or-fight response, general adaptation syndrome, stress response Physiology A constellation of physiologic responses to fear or perceived stress imminent danger or anticipated pain, which triggers full-scale CNS activation and release of 'stressors' by adrenal medulla–eg epinephrine and norepinephrine and cortex–eg corticosteroids, mineralocorticoids, kidneys–renin, pancreas–insulin Clinical Tachycardia, ↑ blood flow to muscle, ↑ BP, muscle tone, ↑ O2 consumption, sweating, ↑ respiratory rate, tremor, pallor, ↑ inotropism, vasoconstriction, mydriasis, bronchodilation, hyperglycemia. Cf Relaxation response.

fight-or-flight response,

n the psychophysiologic response to a perceived threat that prepares the organism for action.
References in periodicals archive ?
Military spokesman Brigadier Udaya Nanayakkara said those who reached army-held areas had told authorities that the Tigers had shot at dozens of fleeing people.
The militia is armed by the government, killing the people fleeing the villages.
High school students and undergraduates will find Fleeing for Freedom a friendlier read than either of the texts from which it was taken, but the thoughtful among them will be left with more questions than answers.
Would you have punished border guards who followed orders to shoot people fleeing to the West?
During the pursuit, the suspect's vehicle collided with another vehicle and, putting his car in reverse, the man then hit a Citrus County cruiser before exiting his vehicle and fleeing on foot.
TROOPS and Ba'ath Party members are attempting to flee Baghdad by disguising themselves in large crowds of fleeing Iraqi civilians.
According to Lee, the refugees have no other choice but to seek asylum in a country other than China given Beijing's crackdown on people fleeing the North.
Omar is now on the run after fleeing a siege around his mountain hideout on a motorbike two weeks ago.
The more than two million Afghan refugees living in Pakistan arrived in several waves: fleeing the Soviet invasion in 1979, fleeing a brutal civil war after the Soviets withdrew a decade later, fleeing the Taliban who took power in 1996, fleeing a 3-year-old drought, and, most recently, fleeing the U.
The respondents in this case, which involved the use of police roadblocks to stop a fleeing vehicle, "allege the police acting under color of law, violated Brower's Fourth Amendment rights by effecting an unreasonable seizure using excessive force.
NAIROBI: A large number of refugees are fleeing from southern Sudan into neighbouring countries in fear of government air raids, factional fighting and general lawlessness, the UN refugee agency said yesterday.
The 100 years which opened with the flight of east European Jews from Tsarist oppression ends with the image of fleeing Kosovans and East Timorese burnt onto the retina of the world community.