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Edexcel International A Level Biology, topic 8

Coordination, Response and Gene Technology

Coordination, Response and Gene Technology is topic 8 of Pearson Edexcel International A Level Biology (YBI11) and is examined in Unit 5. It covers how neurones, synapses, receptors, hormones and plant growth substances coordinate responses, the structure and imaging of the brain, and how recombinant DNA, microarrays and genetically modified organisms are used. It is A Level only content (IA2).

Subtopics

Work through them in order. Each one has notes, exam questions and flashcards, and a PDF of each.

  1. 1Neurones, reflexes and the nervous system A Level onlySpec 8.1–8.3, 8.10Sensory, relay and motor neurones, myelin and Schwann cells, the CNS and PNS, and the spinal reflex arc with grey and white matter.NotesQuestions 6Flashcards 11
    1. Sensory, relay and motor neurones
    2. The nervous system and its effectors
    3. The spinal reflex arc
  2. 2Impulses, synapses and receptors A Level onlySpec 8.4–8.9Action potentials and saltatory conduction, cholinergic synapses, the pupil reflex, drugs at synapses, rods and rhodopsin, and habituation.NotesQuestions 8Flashcards 24
    1. Resting potential and action potentials
    2. Myelination and saltatory conduction
    3. Synapses and neurotransmitters
    4. How the pupil dilates and constricts
    5. Drugs and nerve impulse transmission
    6. Rods, rhodopsin and the optic neurone
    7. Habituation
  3. 3Plant responses A Level onlySpec 8.11, 8.12Phytochrome, auxin (IAA) and gibberellins bring about plant responses by changing transcription; core practical 18 tests amylase in grains.NotesQuestions 8Flashcards 12
    1. Phytochrome
    2. Auxin (IAA)
    3. Gibberellins
    4. Core practical 18: amylase in germinating cereal grains
  4. 4The brain and hormonal control A Level onlySpec 8.13–8.16Nervous and hormonal coordination, regions of the human brain, brain scanning (CT, MRI, fMRI, PET) and dopamine and serotonin imbalances.NotesQuestions 8Flashcards 15
    1. Nervous and hormonal coordination
    2. Regions of the human brain
    3. Imaging the brain: CT, MRI, fMRI and PET
    4. Brain chemicals and ill health
  5. 5Gene technology A Level onlySpec 8.17–8.22Making recombinant DNA, inserting it into cells, drugs from GMOs, microarrays, bioinformatics and the risks and benefits of GMOs.NotesQuestions 8Flashcards 16
    1. Making recombinant DNA
    2. Inserting recombinant DNA into cells
    3. Drugs from genetically modified organisms
    4. Microarrays and bioinformatics
    5. Risks and benefits of GMOs

Whole topic

When you have done the subtopics: test yourself on everything, or print the lot.

Revision notesAll revision notesEvery subtopic in one PDF · 26 pagesDownload PDFWorksheetTopic testAll 38 questions (135 marks) with the mark scheme · 18 pagesDownload PDF
FlashcardsAll flashcards78 cards from every subtopicPractisePrint
Mind mapMind mapThe whole topic on one pageViewPDF