Cellular and Molecular Biology

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Paracrine Hormone Characteristics


Hormones can be classified by they are secreted directly into the blood stream, whether they are secreted via a duct, how far they travel and what cells they stimulate. For example, exocrine hormones are secreted into a duct and usually travel far to stimulate distant cells.

Cells that release paracrine hormones secrete these hormones into the

and these hormonal chemicals travel to a

to stimulate

embedded in the membranes of other cells.