Are autocrine and paracrine types of hormones or just a delivery mechanism by which they act?

Expert Solution

Autocrine and paracrine are both delivery mechanism and hormone effects. Autocrine: mode of hormone action to which hormons bind to receptors on to the cell and affects the cell that produces it. e.g. growth factors that stimulate cell division. Paracrine: describes hormone action where hormones are released from cells and bind to receptor on nearby cells and affects their function.

Paracrine signaling acts on nearby cells, endocrine signaling uses the circulatory system to transport ligands, and autocrine signaling acts on the signaling cell.
Autocrine signaling: a cell targets itself, releasing a signal that can bind to receptors on its own surface.
paracrine actions of hormones are provided by the ovaries and testes.
Autocrine signaling is a form of cell signaling in which a cell secretes a hormone or chemical messenger (called the autocrine agent) that binds to autocrine receptors on that same cell, leading to changes in the cell.

Sydney Mullin answered 11 months ago

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Are autocrine and paracrine types of hormones or just a delivery mechanism by which they act?

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