Human physiology mark scheme
I MucosaII Smooth muscleIII VilliA I onlyB 1 and II onlyC I and III onlyD I, II and IIII Tobacco smokeII Radon gasIII UV lightIV Asbestos dustA I onlyB I and II and IV onlyC I and III onlyD All of themI Medulla oblongataII Adrenaline (epinephrine)III BaroreceptorsIV AV node
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