Types of drug drugs and the human body gcse biology. They are wrapped in fatty cells called a myelin sheath which helps the neurones conduct their electrical impulses faster. Stimulants and depressants affect the synapses between neurones in the nervous system. Drugs and the human body illegal drugs are classified on a scale from a to c. Includes a step by step animation of transmission across the synapse. These are the junctions between neurons where messages are passed on by neurotransmitters.
Covers the structure of synapses, transmission across them and the effect of different neurotransmitters and drugs. Buy gcse science 91 aqa gcse 91 biology achieve grade 89 workbook by collins uk isbn. Neurones can be very long, over a metre in length in some cases. Gcse synapse revise junctions of nerve cells or neurons.
Learn more about illegal drugs, tobacco, alcohol, prescription drugs and antibiotics with bbc bitesize gcse biology. Aqa revision guide with online edition higher cgp gcse combined science 91 revision by cgp books, cgp. There are different types of drugs, and they have different effects on the body. Revise all you learned about them in year 10 and year 11, by playing this interactive aqa unit 1 quiz. Aqa gcse combined science higher revision and exam. Drugs are chemicals that can alter the way the body works. June 2018 this fantastic cgp revision guide is perfectly. Synapses and reflexes 91 gcse biology ocr, aqa, edexcel. Aqa 91 gcse biology or combined science for paper 1 duration. A neurone is a specialised cell that is adapted to pass electrical impulses.
Gcse biology revision science section covering neurones, synapses, nervous system, cns, receptors, effectors, nerves, hormones, electrical impulses, sensory, relay. A worksheet and a fully complete answer sheet which is aimed at post 16 biology students and covers drugs and hormone control. Drug type caffeine, amphetamines, cocaine, mdma ecstasyalcohol, barbiturates, marijuana benzodiazepinescodeine, methadone, morphine, diamorphine heroin stimulate the release of neurotransmitter in excitatory synapses associated with wakefulnessinhibit neuroreceptors in excitatory synapses associated with wakefulnessprevent the transmission of pain signals to the brain and spinal cord. Synaptic transmission is a comprehensive guide to the topic of neurotransmission that provides an indepth discussion on many aspects of synapse structure and functiona fundamental part of the neuroscience discipline.
Specifically it looks at the junctions between nerve cells the synapses. Gcse, as and alevel sciences textbooks print and digital aqa. Browse cgps secondary ks3, igcse, gcse and alevel science books, covering edexcel, aqa, ocr and more for combined science. From an expert team of authors including adam boxer, philippa gardom hulme, jo locke, helen reynolds, alom.
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