World’s Most Amazing Pictures

Definition of adrenalin is next: “A molecule that acts as both a hormone and neurotransmitter. Adrenaline is synthesized during times of stress and produces various effects that include increased heart rate, sweating, and increased metabolism.” And these photos show us the real definition of adrenaline.Must See..

the real meaning of adrenaline28 640x480 Worlds Most Amazing Pictures

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