Explanation

• Cell signaling refers to the process by which cells communicate with each other and respond to their environment. It involves the transmission and reception of signals, which can occur through both intercellular and intracellular pathways.
• Intercellular signaling refers to the communication between different cells, where signals are transmitted through the extracellular space, such as through hormones, neurotransmitters, or other signaling molecules.
• Intracellular signaling refers to the communication within a cell, where signals are transmitted through various signaling pathways, such as protein-protein interactions, phosphorylation cascades, and gene regulation.