BI110 Chapter Notes - Chapter 85: Cell Membrane, Protein Kinase A, Beta Blocker
Document Summary
Mechanisms of intercellular communication can be divided into 5 categories: autocrine signalling. A cell responds to a chemical signal that it secretes, often to amplify or maintain a physiological response. A local regulator (chemical signalling molecule) only acts a short distance from where it is secreted. Is involved in differentiation of t cells of the adaptive immune system. During clonal expansion, the t cell divides and differentiates: paracrine signalling. Elicits response in cells close to the signalling cell. Plays a role in embryonic development because local. Is mediated by local regulators regulators are used to mediate limb development. Local regulators act over a short distance, limb development occurs only in specific regions of the body. A chemical called a hormone circulates the blood from the cell that secretes it to the target cell. Cell that secrete hormones (called endocrine cells) are part of the endocrine system. Permits communication between distant cells in an animal: endocrine signalling, synaptic signalling.
