Cell communication is essential for coordinating cellular activities and maintaining homeostasis:
1. Cell Junctions: These are specialized structures that connect cells to each other, allowing for communication and adhesion. Examples include tight junctions, gap junctions, and desmosomes. 2. Signaling Molecules: Cells release signaling molecules such as hormones, neurotransmitters, and growth factors that bind to receptors on target cells, triggering specific responses. 3. Extracellular Matrix (ECM): The ECM is a network of proteins and polysaccharides surrounding cells, providing structural support and facilitating communication through cell-ECM interactions.
