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Bio 30

Bio 30. objectives. Know some individuals who contributed to early cell theory Understand different microscopes and their role in cytology (know that word too) Mentions some developments or techniques that contributed to cell theory. objectives. Summarize major points of cell theory

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Bio 30

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  1. Bio 30

  2. objectives • Know some individuals who contributed to early cell theory • Understand different microscopes and their role in cytology (know that word too) • Mentions some developments or techniques that contributed to cell theory

  3. objectives • Summarize major points of cell theory • Recall major cell structures and organelles and their apparent values to cells. • State major diffs between plant and animal cells • Explain various relationships within organism and cellular arrangements which make up an efficient functioning organism

  4. Most cells invisible to naked eye • Largest single nerve cell is 1m long from back to your foot… but too small diameter to see. • Therefore, magnification was absolutely essential to cell theory

  5. magnification • This is standard European “history” of magnification: • Two Dutch dudes (brothers) named Janssen • 1500’s • Antony Van Leeuwenhoek – major contributor. Also Dutch dude. 1600’s • Prob first to observe single celled orgs

  6. Robert Hooke • Published paper in 1665.. Described cells. • Dude used a compound microscope - (big deal). • Observed dead cork cells

  7. Neither of these dudes actually linked cells to important functions of orgs. • These discoveries were only possible with Light microscopes. • Hand lenses magnify ~ 10x, Leeuwenhoek’s did ~270x

  8. Scopes we have will do ~ 400x • Some sweet ones do 2000x (we cant afford those) • 1930’s developments included electron microscopes. • Huge improvement. Way more magnification. Way cooler stuff to look at and learn from

  9. Cell theory (jean Lamark) • All orgs made of cells • Cells are basic structure making all bodies

  10. Rudolf Virchow • All processes common to living orgs occur in individual cells. (wrong) • All new cells arise from existing cells(yes)

  11. Cell function/structure • Lots of times this is what we “think” parts of cells do. • No normal or typical org cell, all orgs different • Even within orgs, cells contain different things and do different things

  12. protoplasm • The living material within a cell • Cytoplasm • Material OUTSIDE the nucleus. • Organelles • Small distinct bodies within cell

  13. Eukaryotes

  14. Prokaryotes

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