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Across 1. control of core body temperature 5. the ideal value of a physiological factor that the body controls in homeostasis 6. organ or tissue that carries out an action in response to stimulus (e.g. muscles, glands) 11. a change in the environment that is detected by receptor, and may cause a response 12. a change in parameter level even further from initial change that strengthen the physiological responses

Down 2. control of water content of the fluids in the body 3. stabilises internal condition by reversing a change in a controlled condition 4. receives a message and coordinates a response 7. detects change in environment (e.g. eyes, skin) 8. maintenance of stable internal environment despite changes in external environment 9. information sent by central control along efferent pathway to effector 10. sensory information sent along afferent pathway to central control