GCSE AQA Biology B2.1

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  • B2.1 Cells, Tissues and Organs
    • Animal and Plant Cells
      • Animal Cell
        • Mitochondria - site of respiration which releases energy
        • Ribosomes - where protein synthesis takes place
        • Nucleus - controls the activities of the cell and contains genetic information
        • Cytoplasm - site of most of the cell's chemical reactions
        • Cell Membrane - controls the passage of substances into and out of the cell
      • Plant Cell
        • Cell Membrane
        • Ribosomes
        • Permanent Vacuole - important in keeping the cell rigid
        • Mitochondria
        • Cytoplasm
        • Chloroplasts - site of Photosynthesis (contains chlorophyll)
        • Cell Wall - gives strength and support
        • Nucleus
    • Diffusion
      • Substances that need to enter the cells
        • Glucose
        • Oxygen
      • Substances that need to leave the cells
        • Carbon Dioxide
        • Secretes (Chemicals)
      • Diffusion is the net movement of particles from an area oh high concentration to an area of low concentration
    • Tissues and Organs
      • Human Tissues
        • Muscular Tissue - contracts to bring about movement
        • Glandular Tissue - contains secretory cells that can produce enzymes or hormones
        • Epithelial Tissue - covers the body
      • Plant Tissues
        • Epidermal Tissue - covers the surface of plants
        • Mesophyll Tissue - contains lots of chloroplasts for photosynthesis
        • Xylem and Phloem - transport materials in plants


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