Signalling within and between cells is an essential part of many biological processes, from the development of the body, to the activity of our immune system. Recent advances in molecular cell biology have allowed us to identify the components of signalling pathways, and examine how they interact to form the carefully orchestrated and controlled networks on which the complexity of a living organism is built. Cell Signalling presents a carefully structured introduction to this intricate subject, introducing those conserved features which underlie many different extra-and intracellular signalling systems. Starting with an overview of cell signalling, highlighting its importance in many biological systems, the book goes on to explore the key components of extracellular and intracellular signalling mechanisms, before examining how these components come together to create the signalling pathways, which are so crucial to the survival of many living organisms. Companion Web Site - Includes figures from the book available to download to facilitate lecture preparation