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Cell Biology

Cell Biology. What is a cell?. Video http://www.youtube.com/watch?v=zufaN_aetZI&feature=fvw. Key terms and structures. Prokaryote vs Eukaryote Key cell structures Cell membrane Cell wall Cytoplasm Organelles Nucleus Mitochondria Vacuoles Chloroplasts

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Cell Biology

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  1. Cell Biology

  2. What is a cell? • Video http://www.youtube.com/watch?v=zufaN_aetZI&feature=fvw

  3. Key terms and structures • Prokaryote vs Eukaryote • Key cell structures • Cell membrane • Cell wall • Cytoplasm • Organelles • Nucleus • Mitochondria • Vacuoles • Chloroplasts • ER, Ribosomes and Golgi apparatus

  4. Functional view • What does an organism need to do? • What are the structures that allow a cell to do that?

  5. Unicellular vs Multicellular What are the advantages and disadvantages of each? • Unicellular organisms have to have everything they need for life in the one cell • Multicellular organisms can specialise

  6. Animal Cell vs Plant Cell • What are the key similarities and differences between plant and animal cells? • Plant cells have: • Cell wall • Chloroplasts • Giant vacuole • Just about everything else is the same (although animal cells are more likely to have cytoskeletons)

  7. Make your own cell • Animal cell • Plastic bag • Straws • Pipe cleaner • Golf ball • Water • Beads • Rubber bands • Plant cell • Plastic container • Plastic bag • Balloon • Pipe cleaner • Golf ball • Water • Beads • Rubber bands

  8. Interesting things about cells • Sponges – partway between unicellular and multicellular – communities, can rebuild themselves after being put through a sieve!! • Single celled animals that behave like multicellular animals – eg parameceum – which hopefully we will see in prac • Flagella and cilia • http://www.youtube.com/watch?v=QGAm6hMysTA • Eyespots, “noses”

  9. Interesting things about cells • The water-bear is the first multicellular animals to survive in space (bacteria have already been known to survive being left on the moon)

  10. Size and structure of cells • The longest cell in the human body is the sensory neuron running from your toe to the top of the spinal cord. There are thousands of these. • The smallest cell in your body is also a neuron, in the brain, it is about 4 microns long (1000 microns make a millimetre). • The biggest cell in the body (well, some bodies) is the ovum, the human egg cell.

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