Chemical signaling is a process by which cells communicate with each other using chemical substances called signaling molecules. These molecules can include hormones, neurotransmitters, and other biochemicals that transmit information between cells. This communication is essential for various biological functions, such as growth, immune responses, and maintaining homeostasis. In chemical signaling, a signaling molecule is released by one cell and binds to a specific receptor on another cell, triggering a response. This interaction can lead to changes in cell behavior, gene expression, or metabolic activity. Examples of chemical signaling include the action of insulin in regulating blood sugar levels and neurotransmitters transmitting signals in the nervous system.