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Edexcel International A Level · Biology

Respiration, Internal Environment, Coordination and Gene Technology(Unit 5) revisionBuild it yourself.

Unit 5 covers 2 topics and 27 subtopics. Pick the ones you keep getting wrong and LOCKIN writes you an original exam-style paper, with a full mark scheme.

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What's in Unit 5

Every topic below can be selected on its own, or combined into one paper.

Respiration, Muscles and the Internal Environment

  • Aerobic respiration overview
  • Glycolysis
  • Link reaction and Krebs cycle
  • Oxidative phosphorylation
  • Anaerobic respiration and lactate
  • Respiratory quotient
  • Muscles, skeleton and joints
  • Muscle structure and contraction
  • Cardiac muscle and cardiac output
  • Adrenaline and fight or flight
  • Feedback and homeostasis
  • Kidney structure and function
  • Osmoregulation and ADH
  • Transcription factors and gene control

Usually 2–10 marks

Coordination, Response and Gene Technology

  • Neurones and the nervous system
  • Reflex arcs
  • Action potentials and conduction
  • Synapses and drug action
  • Detecting stimuli and vision
  • Habituation
  • Plant responses and hormones
  • Nervous and hormonal coordination
  • Brain structure and function
  • Brain imaging techniques
  • Brain chemical imbalances
  • Recombinant DNA and GM organisms
  • Microarrays and bioinformatics

Usually 2–10 marks

Other Biology units

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