AQA•A-Level•Biology
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Organisms Respond to Changes
Nervous and hormonal coordination, muscle contraction, and homeostasis
Practice 58 subtopics in Organisms Respond to Changes. All questions match the AQA A-Level specification.
About Organisms Respond to Changes
Organisms Respond to Changes is a key topic in the AQA A-Level Biologyspecification. This topic covers nervous and hormonal coordination, muscle contraction, and homeostasis.
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All Subtopics (58)
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Nervous communicationHormonal communicationTropisms in plantsTaxes and kinesesReflexesReceptorsPacinian corpuscleRetina structureRods and conesNeurone structureSensory neuronesMotor neuronesRelay neuronesResting potentialAction potentialRefractory periodSaltatory conductionMyelinationFactors affecting conduction speedSynapse structureSynaptic transmissionNeurotransmittersAcetylcholineSummationEffects of drugs on synapsesMuscle structureSarcomere structureSliding filament theoryRole of ATP in contractionRole of calcium ionsFast and slow twitch fibresRequired Practical 10: Dissection of muscle and nerve tissueHomeostasis definitionNegative feedbackPositive feedbackBlood glucose regulationInsulinGlucagonSecond messengersDiabetes mellitusType 1 and Type 2 diabetesADHOsmoregulationKidney structureNephronUltrafiltrationSelective reabsorptionLoop of HenleCounter-current multiplierRequired Practical 11: Animal response investigationPlant hormonesAuxinsGibberellinsEtheneAbscisic acidPhototropism mechanismCommercial uses of plant hormonesRequired Practical 12: Plant response investigation
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