Heredity And Hormones

The endocrine system and the glands that are within it are there to help people

become the individuals that they are. Chemical substances are released into the

bloodstream from the endocrine glands, these are called hormones. Hormones function

as messengers that are also quite similar to neurotransmitters. Norepinephrine can

serve as both a hormone and a neurotransmitter.

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