Problem:

Cell signaling allows cells to communicate with each other through signal transduction pathways. When a paper cut damages skin cells in a finger, the cells near the cut must begin producing new cells to replace the cells that were lost. Growth factor signal molecules are released into the extracellular spaces near the cut.

Required:

Question: How do adjacent cells respond to these signal molecules?

Put the three phases in the signal transduction pathway in order.

• Growth factor signal molecules cause changes in protein receptors, triggering changes in other proteins in the cell's cytosol.
• Proteins in the cell's cytosol activate proteins in the nucleus, causing the cell to begin the process of mitosis in response
• protein receptors on cells near the cut bind to growth factors signal molecules

Could someone explain this to me?