GOLDEN RULES FOR GCSE AQA BIOLOGY 9-1PAPER 2

GOLDEN RULES FOR GCSE AQA BIOLOGY 9-1PAPER 2The nervous system1.Messages are transferred downNEURONES as ELECTRICAL IMPULSES and across SYNAPSES as CHEMICAL SIGNALS2.Stimuli can ONLY EVER be the following.....Light (sight)Chemicals (taste and smell)Pressure (touch)TemperatureSoundNever say “the stimulus is the frying pan” if you are touching a hot pan. The stimulus would be temperature/heat.3.Receptors are always cells that detect stimuli. They can only ever be the following...Light receptors in the eyeChemical receptors in the tongue or nosePressure receptors in the skinTemperature receptors in the skinSound receptors in the ear4.The coordinator is the central nervous system (CNS)Say relay neurone /spinal cord (NOT SPINE!) if it is a reflex actionBrain if not a reflex action5.The effector can only ever beMuscles (for movement)Glands (for secreting chemicals eg hormones and enzymes)6.If asked about a response arc refer to each of the following in your answer: