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Paracrine signaling is a form of cell signaling in which the target cell is near ("para" = near) the signal-releasing cell.

A distinction is sometimes made between paracrine and autocrine signaling. Both affect neighboring cells, but whereas autocrine signaling occurs among the same types of cells, paracrine signaling affects other types of (adjacent) cells.

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Which of the following is characterized by a cell releasing a signal molecule into the environment followed by a number of cells in the immediate vicinity responding?

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