AP BIOLOGY

Detailed explanation-1: -Paracrine signaling . Define autocrine signaling: It refers to self-targeting, i.e., the cell signals produced by the cells bind to the receptors of the same cells. Define paracrine signaling: Paracrine signaling is between cells that are closely associated or in the vicinity.

Detailed explanation-2: -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.

Detailed explanation-3: -Autocrine signaling. In autocrine signaling, a cell signals to itself, releasing a ligand that binds to receptors on its own surface (or, depending on the type of signal, to receptors inside of the cell).

Detailed explanation-4: -Autocrine signaling is a form of signaling in which a cell secretes a hormone or a chemical substance that binds to the receptors on the same cell, leading to functional changes in the cell, whereas paracrine signaling is a form of cell signaling in which the target cell is near the signal-releasing cell.

Detailed explanation-5: -Autocrine signalling is a type of cell communication, that occurs when the cell secretes a substance that is capable of provoking a reaction in itself. It comes from auto-, a Greek prefix meaning ‘self’. The secreted molecules are known as local mediators, because they only affect cells in their immediate vicinity.