![]() ![]() ![]() An easy way to remember the difference is by knowing the Latin origin of the prefixes: inter- means “between” (like interstates allow rapid travel between states) and intra- means “inside” (like intravenous).Ĭhemical signals between cells are called ligands. A ligand is a molecule that binds another specific molecule. There are two kinds of cellular communication: communication between cells is called intercellular signaling, and communication within a cell is called intracellular signaling. At this very moment, your cells are sending and receiving millions of messages in the form of chemical signaling molecules. All Khan Academy content is available for free at Communication between and within cellsĬells can detect what’s going on around them, and they can respond in real time to cues from their neighbors and environment. ![]() The information below was adapted from OpenStax Biology 9.1 and Khan Academy Introduction to cell signaling. Define quorum sensing and describe the role of cell signaling in life history and pathogenicity of microbes.Define and differentiate between positive and negative feedback loops in hormonal control.Define and recognize crosstalk and other sources of complexity in signaling pathways.Define signal transduction and describe the general pathways of signal transduction and amplification for steroid vs non-steroid hormones.Differentiate between the types of cell signals (autocrine, endocrine, etc) and the classes of hormones (polypeptide, amino acid, and steroid). ![]()
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