AQA GCSE Biology Paper 2 Questions & Answers(Graded A+)

AQA GCSE Biology Paper 2 Questions & Answers(Grade What is homeostasis? - ANSWERThe maintenance of a constant internal environment. What is a stimulus? - ANSWERA change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - ANSWERDetect the stimulus or change in environment. What happens after the receptors? - ANSWERReceptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? - ANSWERThe brain or spinal cord What is an effector? - ANSWERMuscles or glands that bring about a response. What do the muscles and glands do in response to stimuli? - ANSWERMuscles contract and glands secrete chemical substances(hormones). What is a sensory neurone? - ANSWERA neurone that carry information from the receptors to the CNS. What is a relay neurone? - ANSWERNeurones that carry impulses from the sensory neurone to the motor neurone. d A+)