In some cases, tumors support their unrestricted proliferation producing a growth factor that they also respond to. This mechanism is called _______ signaling.

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Autocrine signaling is when a cell secretes a hormone or growth factor that binds to receptors on its own surface, thereby promoting its own growth and proliferation. In tumors, this mechanism can allow them to continue growing and dividing uncontrollably.

In Some Cases, Tumors Support Their Unrestricted Proliferation Producing a Growth