5. Communication, Homeostasis & Energy (OCR A Level Biology) Get ready for your OCR A Level Biology exams with our revision resources. Find everything you need to revise this topic, so you can go into your exam confident and prepared. Teachers and examiners write all our resources, and they’re designed specifically for each exam board. We regularly update them to match the latest syllabus, so you’ll only revise the most accurate, up-to-date information. Explore the collection below to get started.
5. Communication, Homeostasis & Energy Revision Notes Communication & Homeostasis The Need for Homeostasis The Principles of Homeostasis Cell Signalling Thermoregulation Excretion The Importance of Excretion The Mammalian Liver: Structure The Mammalian Liver: Function The Liver Under the Microscope The Mammalian Kidney: Structure The Mammalian Kidney: Function The Kidney Under the Microscope Osmoregulation Kidney Failure Excretory Products & Medical Diagnosis Neuronal Communication Neurones Mammalian Sensory Receptors Resting Potentials Action Potentials Transmission of Nerve Impulses The Refractory Period Factors that Affect the Speed of Conduction The Role of Synapses Transmission Across a Cholinergic Synapse Hormonal Communication The Endocrine System The Pancreas under the Microscope Controlling Blood Glucose Concentration Diabetes Plant & Animal Responses Plant Responses Investigating Phototropism & Geotropism Plant Hormones Auxins & Apical Dominance Gibberellin Practical: Effect of Plant Hormones on Growth Commercial Use of Plant Hormones Mammalian Nervous System The Human Brain Reflex Actions Coordination of Responses Factors Affecting Heart Rate Investigating Factors Affecting Heart Rate Mammalian Muscle Structure Transmission Across a Neuromuscular Junction The Sliding Filament Model Photosynthesis Photosynthesis & Respiration Chloroplast Structure & Function Photosynthetic Pigments Practical: Investigating Photosynthetic Pigments with Chromatography The Light-Dependent Stage Using the Products of the Light-Dependent Reaction The Light-Independent Stage Uses of Triose Phosphate Factors Affecting the Rate of Photosynthesis Practical: Investigating Factors Affecting the Rate of Photosynthesis Respiration The Need for Cellular Respiration Structure of the Mitochondrion The Four Stages in Aerobic Respiration Glycolysis The Link Reaction The Krebs Cycle The Role of Coenzymes Oxidative Phosphorylation Anaerobic Respiration Energy Yield of Aerobic vs Anaerobic Respiration Practical: Investigating the Rate of Respiration Respiratory Substrates Respiratory Quotient (RQ) Practical: Respirometer 5. Communication, Homeostasis & Energy Exam Questions Communication & Homeostasis Multiple Choice Questions Structured Questions Excretion Multiple Choice Questions Structured Questions Neuronal Communication Multiple Choice Questions Structured Questions Hormonal Communication Multiple Choice Questions Structured Questions Plant & Animal Responses Multiple Choice Questions Structured Questions Photosynthesis Multiple Choice Questions Structured Questions Respiration Multiple Choice Questions Structured Questions OCR A Level Biology Past Papers