Cell signaling networks are complex systems that allow cells to communicate with each other and respond to their environment. These networks involve various molecules, such as hormones, proteins, and receptors, which transmit signals from one cell to another. When a signaling molecule binds to a receptor on a cell's surface, it triggers a series of biochemical events inside the cell, leading to a specific response. These signaling pathways are crucial for many cellular processes, including growth, immune responses, and metabolism. Disruptions in cell signaling can lead to diseases, such as cancer or diabetes, highlighting the importance of understanding these networks for developing targeted therapies.