Tag Archives: fight or flight

Stress can weaken defenses – Study

Research from the lab of Mark Alkema, PhD, professor of neurobiology, sheds light on how the “flight-or-flight” response impairs long-term organism health. The study, conducted in the nematode worm, C. elegans, a common research model, was published in Nature.

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When humans perceive a dangerous or stressful situation, the body releases stress hormones such as adrenalin. Adrenaline makes the heart beat faster, increases blood flow to the brain and muscles, and stimulates the body to make sugar to use for fuel. The rush of adrenaline triggers the “fight-or-flight” response which gives the person the ability to escape a predator or respond to a threat. Continue reading

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