Final answer:
Growth factors, hormones, and cell-to-cell contact stimulate cells to undergo the cell cycle.
Explanation:
Growth factors, hormones, and cell-to-cell contact can stimulate a cell to go through the cell cycle. Growth factors like Epidermal Growth Factor (EGF) bind to receptors, initiating signaling pathways that lead to cell division. Hormones like Human Growth Hormone (HGH) play a role in regulating cell division, and cell-to-cell contact can also affect cell cycle progression.
Learn more about Cell Cycle Regulation here:
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