Biology Module 5 Keywords 0.0 / 5 ? Biologymodule 5A2/A-levelOCR Created by: Faz.beCreated on: 03-12-18 11:48 cell signalling the way in which cells communicate with each other 1 of 6 effector a cell, tissue or organ that brings about a response 2 of 6 homeostasis maintaining a constant internal environment despite changes in external and internal factors 3 of 6 negative feedback the mechanism that reverses a change, bringing the system back to the optimum 4 of 6 positive feedback the mechanism that increases a change, taking the system further away from the optimum 5 of 6 sensory receptors cells/sensory nerve endings that respond to a stimulus in the internal or external environment of an organism and can create action potentials. 6 of 6
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