Negative & positive feedback (Edexcel Int. A-level Biology)

Topic 7: Respiration, Muscles and the Internal Environment (Edexcel Int. A-level Biology)

This bundle contains 20 lesson PowerPoints which are highly detailed to ensure that the topic 7 content is covered at the depth required for A-level Biology. The lessons have been intricately planned to contain a wide variety of tasks that will engage and motivate the students whilst covering the current material and to make links to other lessons in this topic as well as to the previous 6 topics. The tasks, which include exam-style questions with mark schemes, guided discussion time and quick quiz competitions, cover the following points in the respiration, muscles and the internal environment topic of the Edexcel International A-level Biology specification: * The overall reaction of aerobic respiration * The many steps of respiration are controlled and catalysed by a specific intracellular enzyme * The roles of glycolysis in aerobic and anaerobic respiration * The role of the link reaction and the Krebs cycle in the complete oxidation of glucose * The synthesis of ATP by oxidative phosphorylation * Know the way in which muscles, tendons, the skeleton and ligaments interact in movement * The structure of skeletal muscle fibre * The structural and physiological differences between fast and slow twitch muscle fibres * The contraction of skeletal muscle in terms of the sliding filament theory * The myogenic nature of cardiac muscle * The coordination of the heartbeat * The use of ECGs in the diagnosis of abnormal heart rhythms * The calculation of cardiac output * The control of heart rate and ventilation rate by the cardiovascular control centre and the ventilation centre in the medulle oblongata * The role of adrenaline in the fight or flight response * The meaning of negative feedback and positive feedback control * The principle of negative feedback in maintaining systems within narrow limits * The meaning of homeostasis and the maintenance of a dynamic equilibrium in exercise * The gross and microscopic structure of the mammalian kidney * Selective reabsorption in the proximal tubule * The control of mammalian plasma concentration * Switching genes on and off by DNA transcription factors and the roles of peptide and steroid hormones Due to the detail included in this lesson bundle, it is estimated that it will take in excess of 2 months of allocated A-level teaching time to cover the content If you would like to sample the quality of the lessons in the bundle, then download the skeletal muscle, coordination of the heartbeat, role of adrenaline and control of mammalian plasma concentration lessons as these have been uploaded for free