Adrenaline is a hormone strongly secreted by human beings in a state of stress, which can instantly strengthen the function of the heart, strengthen the delivery of oxygen and nutrients assigned to the delivery of the body is stronger than usual N times, so frightened, high altitude drop, and so on will make the adrenaline secretion quickly, roller coasters, bungee jumping, parachute jumping can be a strong stimulus to the secretion of adrenaline, so it is attractive

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