![]() ![]() It is one of the main neurotransmitters, which means it is the chemical which jumps the gap (synapse) between nerve endings, so transmitting the signal between one nerve and the next. This molecule, however, serves a much different purpose. Norepiniphrine (also called noradrenaline)is a molecule made in the brain and limbic system, and involves only a slight modification from the basic adrenaline structure. This increases the heart and breathing rate in preparation for the ensuing action. ![]() Fright causes the brain to send signals to the renal glands which start pumping large amounts of adrenalin into the bloodstream. Both responses would require extra supplies of blood and oxygen in the muscles. When an animal is threatened, the options are usually either to stand its ground and fight, or run away as fast as possible. This is the basis of the so-called 'fight-or-flight' reaction. Fight or Flight?Īdrenaline is the body's activator, and is released in response to anxiety, exercise, or fear. Adrenaline is carried in the bloodstream and affects the autonomous nervous system, which controls functions such as the heart rate, dilation of the pupils, and secretion of sweat and saliva. ![]() Its biological name is epinephrine, from the Greek nephros for kidney. Adrenaline is a natural stimulant made in the adrenal gland of the kidney. ![]()
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