OCR Biology B1 - Body and Plants

Second half of Biology Unit 1.

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  • B1 - Body and Plants
    • The Eye
      • Lens
        • Accomodation
          • Focuses light on the retina
      • Iris
        • Controls amount of light entering the eye
      • Pupil
        • Allows light to enter the eye
      • Cornea
        • Refracts light into the eye
      • Optic Nerve
      • Retina
        • Receptors
          • Detect light
        • Roots
        • Cones
    • Eye Problems
      • SHORT
        • Image before
        • Requires concave lense
      • LONG
        • Image behind
        • Requires convex lense
    • CNS
      • Stimulus ->
        • Receptor ->
          • Sensory Neuron ->
            • Relay Neuron ->
              • Motor Neuron ->
                • Effector ->
                  • Response
            • synapse
              • Relay Neuron ->
                • Motor Neuron ->
                  • Effector ->
                    • Response
    • Homeostatis
      • Maintaining constant internal enviroment
        • Norm = 37.C
          • Too Hot
            • Hair flat
            • Vaso-dilation
            • Sweat (evaporates)
          • Too Cold
            • Shivering
            • Hair Stands
            • Vaso-constriction
    • Plant Responses
      • Photosynthesis
        • CO2 + H2O   -> C6H12O6 + O2
      • Hormones
        • Control Growth
        • Auxin
          • Phototrophic
          • Shoots grow towards light
    • Inheritance
      • Alleles
        • Recessive
        • Dominant
        • Heterozygous
          • Two different
        • Homozygous
          • Two the same
      • Chromosomes
        • Alleles
          • Recessive
          • Dominant
          • Heterozygous
            • Two different
          • Homozygous
            • Two the same
    • Human Variation
      • Random Fusion
        • Not controlling which gametes meet
      • Crossing Over
        • Causing ends of chromosomes to switch genes
      • Random Assort
        • Randomly select chromosomes to go into gametes
    • Genetic Disease
      • Huntingtons
      • Faulty genes
      • Cystic Fibrosis

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