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AQA GCSE BIOLOGY PAPER 2 EXAMS 2022

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AQA GCSE BIOLOGY PAPER 2 EXAMS 2022 What is homeostasis? – ANSWER: Homeostasis is the maintenance of a constant internal environment in order to maintain optimum conditions for enzyme and cellular function. Give examples of conditions maintained by homeostasis in the body - ANSWER● Blood glucose concentration ● Body temperature ● Water levels What two types of responses are used in body control systems? – ANSWER: Nervous and chemical What three components do all control systems have? - ANSWER● Receptors ● Coordination centres ● Effectors What is the function of a receptor? – ANSWER: Receptors detect changes in the environment (stimuli). What is the function of a coordination centre? – ANSWER: Coordination centres obtain and process information from receptors. What is the function of an effector? – ANSWER: Effectors (muscles or glands) bring about responses to stimuli. What is the function of the nervous system? – ANSWER: The nervous system allows the body to react to its surroundings and coordinate an appropriate response.

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