Adrenaline makes your heart beat faster and your lungs breathe more efficiently. It causes your blood vessels to send more blood to your brain and muscles, raises your blood pressure, makes your brain more alert and raises your blood sugar levels to give you energy. Your pupils dilate and you sweat. Definition
Dopamine acts on areas of the brain that give you feelings of pleasure, satisfaction and motivation. Dopamine also plays a role in controlling memory, mood, sleep, learning, concentration, movement and other body functions. Dopamine: How does the "pleasure molecule" work?
Noradrenaline / Norepinephrine: As a neurotransmitter in the brain and spinal cord, norepinephrine: Increases alertness, arousal and attention. Constricts blood vessels, which helps maintain blood pressure during times of stress. Definition
