Biology A2 ATP

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Energy: The ability to do work

  • in a variety of different forms (light, sound, heat)
  • can be changed from one form to another
  • cannot be created or destroyed
  • measured in Joules (J)

Energy is Used for:

  • Metabolism - in chemical reactions (respiration)
  • Movement - inside and out (blood & muscles)
  • Maintenance - repair and division of cells
  • Production of Substances - hormones and enzymes
  • Body temperature - control in endotherms

HOW?

  • Light energy from the sun is converted into chemical energy during photosynthesis (p/s)
  • the chemical energy is converted to ATP
  • ATP is used to perform useful work

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