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Illustration of norepinephrine (noradrenaline). Norepinephrine acts as a stress hormone and neurotransmitter. As a hormone, noradrenaline is formed inside the adrenal gland (adrenal medulla), and as a neurotransmitter it is produced in the brain. As a hormone, norepinephrine increases heart rate and blood pressure by constricting blood vessels. As a neurotransmitter, norepinephrine is produced in the locus caeruleus of the brain and plays a role in increasing alertness, wakefulness, and concentration, among other functions.
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TOP28619050
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達志影像
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RM
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