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Biological messengers are molecules thatÊtransmit information about cells to the receptor. They are also called neurotransmitters, first messengers, or second messengers.
it delivers oxygen :)
there called your nerve cells NO...HORMONES R
there called your nerve cells NO...HORMONES R
No, a Capillary is a small blood vessel that delivers oxygen and other nutrients to cells.
Blood
lipids
ig
delivers oxygen and nutrients to your cells and takes away carbon dioxide and waste from your cells
blood delivers oxygen to the cells
Paracrines
Hormones and neurotransmitters are "messengers" that influence cell function.