AQA GCSE BIOLOGY PAPER 2 EXAMS

AQA GCSE BIOLOGY PAPER 2 EXAMS

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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