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 1035298146 Across 1. cells that possess specific receptors (6, 5) 3. second messenger (4) 4. low level signals can be amplified (9) 5. an organism that relies on external sources of heat (9) 6. a neurone either conducts and impulse or not (3, 2, 7) Down 2. insulating layer of fatty material (6, 6) 3. what is released when an action potential arrives at the synapse? (7, 4) 8. A change in the environment that causes a response (8) 9. a physiological response that allows heat to be radiated (12) 10. things that change one form of energy into another (11)
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