Unit 5 Written Assignment.docx - 1 of 3 The four types of...

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1 of 3The four types of chemical signaling are paracrine, endocrine, autocrine and direct.Paracrine signaling happens when signals are close together and act locally, they move bydiffusion through the extracellular matrix and typically have quick and short responses.Endocrine signals are distant signals from endocrine cells and have a slower response but lastlonger. Endocrine cells release hormones which are then spread throughout the body to reachtheir target cells. Autocrine signals are produced by signaling cells and the “target cell” andsignaling cell can be the same or similar type of cell. Direct signaling across gap junctions if thefourth type of signaling. Gap junctions are the connections between the plasma membranes ofsurrounding cells. These junctions allow small molecules and ions to pass through whileinhibiting the movement of larger molecules like DNA. These passageways allow the cell to

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Term
Summer
Professor
NoProfessor
Tags
Cell Signaling, Prostate cancer, Androgen

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