Juxtacrine signaling is a type of cell communication that occurs when two cells are in direct contact with each other. In this process, signaling molecules on the surface of one cell interact with receptors on the adjacent cell. This interaction can trigger various cellular responses, influencing processes such as growth, differentiation, and immune responses. This form of signaling is crucial during development and tissue repair, as it helps coordinate the behavior of neighboring cells. Juxtacrine signaling is distinct from other signaling types, like paracrine or endocrine signaling, which involve signaling molecules that travel longer distances to reach their target cells.