When a signal molecule binds to a receptor?

When a signal molecule binds to a receptor, it induces a conformational change in the receptor, activating it. This activation triggers a cascade of intracellular signaling pathways, allowing the cell to respond to the external signal. The result can vary widely, influencing processes such as gene expression, cell growth, or metabolism, depending on the type of receptor and the cell's context. Ultimately, this binding and subsequent signaling is crucial for cellular communication and regulation.