Unit 1 Communication and Homeotasis 4.5 / 5 based on 4 ratings ? BiologyCommunication and HomeostasisA2/A-levelOCR Created by: FrancescaJaneCreated on: 29-05-15 16:29 10963472185 Across 1. a physiological response that allows heat to be radiated (12) 5. insulating layer of fatty material (6, 6) 9. low level signals can be amplified (9) Down 2. what is released when an action potential arrives at the synapse? (7, 4) 3. for a short time it is impossible to stimulate the cell again immediatly after an action potential (10, 6) 4. things that change one form of energy into another (11) 6. cells that possess specific receptors (6, 5) 7. an organism that relies on external sources of heat (9) 8. second messenger (4) 10. things that use acetylcholine (11, 8)
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