Sense & Soma

Bones (osteocalcin hormone), not adrenalin, would pump you up to fight/flight when facing danger!

"The researchers found in mice and humans that almost immediately after the brain recognizes danger, it instructs the skeleton to flood the bloodstream with the bone-derived hormone osteocalcin, which is needed to turn on the fight or flight response.

"In bony vertebrates, the acute stress response is not possible without osteocalcin," says the study's senior investigator Gérard Karsenty, MD, Ph.D., chair of the Department of Genetics and Development at Columbia University Vagelos College of Physicians and Surgeons."

Bone, not adrenaline, drives fight or flight response When faced with a predator or sudden danger, the heart rate goes up, breathing becomes more rapid, and fuel in the form of glucose is pumped throughout the body to prepare an animal to fight or flee.