AQA•A-Level•Biology
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Organisms Exchange Substances
Gas exchange, digestion, and mass transport in plants and animals
Practice 47 subtopics in Organisms Exchange Substances. All questions match the AQA A-Level specification.
About Organisms Exchange Substances
Organisms Exchange Substances is a key topic in the AQA A-Level Biologyspecification. This topic covers gas exchange, digestion, and mass transport in plants and animals.
Master all 47 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (47)
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Surface area to volume ratioImportance of exchange surfacesFeatures of exchange surfacesGas exchange in insectsSpiracles and tracheaeGas exchange in fishCounter-current flowGas exchange in dicotyledonous plantsStomata and guard cellsXerophytesMammalian gas exchangeAlveoli structureVentilationRequired Practical 4: Dissection of gas exchange systemStructure of digestive systemPhysical digestionChemical digestionCarbohydrate digestionProtein digestionLipid digestionAbsorption in ileumRole of villiRequired Practical 5: Dissection of alimentary canalNeed for transport systemsSingle and double circulatory systemsStructure of heartCardiac cycleCardiac outputBlood vesselsArteriesArteriolesCapillariesVeinsTissue fluid formationLymphHaemoglobinOxygen dissociation curveBohr effectCarbon dioxide transportXylem structureCohesion-tension theoryTranspirationFactors affecting transpirationRequired Practical 6: Dissection of plant transport tissuesPhloem structureTranslocationMass flow hypothesis
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