Introduction of Cell Communication

CELL COMMUNICATION

INTRODUCTION OF CELL COMMUNICATION

DEFINITION

Cell signaling is the process of cells communicating with other cells within the body, or with the external environment. As a process, cell signaling refers to a vast network of communication between, and within, each cell of our body. With cell signaling, cells are able to coordinate within large, multicellular organisms.

Why and how do cells communicate?

• Cell communication is the process by which a cell detects and responds to signals in its environment.
• Most single-celled organisms can perceive changes in nutrient availability and adapt their metabolism as needed.
• Some single-celled organisms may utilize environmental signals to locate a suitable mate; some send signals to make their numbers known to other members of their species.
• The cells of multi-celled organisms must communicate with one another to coordinate the activities of the organism as a whole.
• Most multi-celled organisms can utilize junctions between cells for direct intercellular signaling.
• But many forms of communication entail binding of a signal molecule to the receptors of target cells.
• Receptor-mediated signalling can be short-range (affecting only nearby cells) or long-range (affecting cells throughout the organism).