Respiration (SL IB Environmental Systems & Societies (ESS))

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Alistair

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Alistair

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Biology & Environmental Systems and Societies

Respiration

What is respiration?

  • Respiration and photosynthesis can be described as processes with inputs, outputs, and transformations of energy and matter
  • Respiration is the conversion of organic matter into carbon dioxide and water in all living organisms, releasing energy
  • Aerobic respiration can be simply described as: glucose + oxygen → carbon dioxide + water

Word equation for aerobic respiration, IGCSE & GCSE Chemistry revision notes

Aerobic respiration

  • Inputs: organic matter (glucose) and oxygen
  • Processes: oxidation processes inside cells
  • Outputs: release of energy for work and heat
  • Transformations: stored chemical energy is transformed into kinetic energy and heat
  • During respiration, large amounts of energy are dissipated as heat, increasing the entropy in the ecosystem while enabling the organisms to maintain relatively low entropy/high organisation

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Alistair

Author: Alistair

Alistair graduated from Oxford University with a degree in Biological Sciences. He has taught GCSE/IGCSE Biology, as well as Biology and Environmental Systems & Societies for the International Baccalaureate Diploma Programme. While teaching in Oxford, Alistair completed his MA Education as Head of Department for Environmental Systems & Societies. Alistair has continued to pursue his interests in ecology and environmental science, recently gaining an MSc in Wildlife Biology & Conservation with Edinburgh Napier University.