Nervous system, reflexes and synapses

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By the end you’ll be able to

describe the role of the nervous system in detecting stimuli, coordinating responses and producing actions through receptors, the central nervous system (CNS), peripheral nerves, effectors and muscles or glands
explain the pathway of a reflex arc using the terms receptor, sensory neurone, relay neurone, motor neurone, synapse, effector and response
compare reflex actions with voluntary responses in terms of speed, automatic control and protective value

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explain transmission across a synapse, including neurotransmitter release, diffusion across the synaptic gap and binding to receptor molecules on the next neurone

interpret data from reaction time or reflex investigations and explain sources of variation such as practice, fatigue, caffeine or distractions

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