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Cell Biology

Cell Biology. Essential Question. Cell. Name those who added to the cell theory ; what did each contribute?. 10.29.2007. Cell. Cell Theory Robert Hooke (1665) first discovered and named “cells” looked at dead cells of a cork plant. Cell. Cell Theory

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Cell Biology

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  1. CellBiology

  2. Essential Question Cell Name those who added to the cell theory; what did each contribute? 10.29.2007

  3. Cell Cell Theory • Robert Hooke (1665) • first discovered and named “cells” • looked at dead cells of a cork plant

  4. Cell Cell Theory • Anton van Leeuwenhoek (1674) • built microscopes to study ‘animalcules’ known today as microorganisms • first to see living cells

  5. Cell Cell Theory • Matthias Schleiden (1838) • stated all plants are made of cells

  6. Cell Cell Theory • Theodore Schwann (1839) • studied human notochord • concluded all animals are made of cells

  7. Cell Cell Theory • Rudolph Virchow (1858) • every cell comes from another cell like it.

  8. Cell Cell Theory • modern Cell Theory • All living things are composed of cells. • Cells are the units of structure and function in living things. • New cells are produced from pre-existing cells.

  9. Cell Cell Structure • Cells can come in 3 shapes 1. Sphere 2. Brick 3. Cube

  10. Cell Cell Structure The smallest are bacteria cells The largest is the human egg

  11. Cell Cell Structure • Two types of organisms • Unicellular- ex. Bacteria, yeasts, Amoeba • Multicellular- some cells are specialized; evolved from unicellular cells

  12. Cell Cell Structure • Levels of organization cell tissue organ organ system organism

  13. Cell Organelles cell membrane

  14. Cell Organelles (transparent layer between cells) cell wall

  15. Cell Organelles nucleus

  16. Organelles (stained green) microtubules Cell

  17. Organelles microfilaments Cell

  18. Organelles (red) ribosome Cell

  19. Organelles (yellow) endoplasmic reticulum Cell

  20. Organelles (purple) golgi apparatus Cell

  21. Organelles lysosome Cell

  22. Organelles vacuole Cell

  23. Organelles mitochondria Cell

  24. Organelles flagella Cell

  25. Organelles cilia Cell

  26. Organelles (green) chloroplast Cell

  27. Organelles (green) cell wall Cell

  28. Organelles centriole Cell

  29. Organelles (white) cytoplasm Cell

  30. Organelles What is a plastid? A storage cell Which 3 organelles are plastids? Cell

  31. Essential Question Cell What are the different states of concentration across a membrane? 11.5.2007

  32. Types of cells cells classifications prokaryote no membrane bound organelles (no nucleus) ex: bacteria eukaryote cells with membrane bound organelles ex: plants, fungi, animals, protists Cell

  33. Transport cell membrane fluid mosaic model membrane constantly moving 3 main molecules proteins carbohydrates lipids hydrophilic (water loving) heads hydrophobic (water fearing) tails Cell

  34. Transport Cell

  35. Transport cell membrane allows for transport of materials into and out of cell Cell

  36. Transport diffusion movement of molecules from higher to lower concentration Cell

  37. Transport equilibrium state in which concentration is equal in all areas Cell

  38. Transport osmosis movement of water from higher to lower concentration. Cell

  39. Transport osmosis hypertonic concentration of solute is greater outside cell hypotonic concentration of solute is less outside cell isotonic concentration of solute is equal on both sides of membrane Cell

  40. Transport osmosis Cell

  41. Transport osmosis Cell

  42. Transport osmosis Which is isotonic, hypertonic, hypotonic? Isotonic hypertonic hypotonic Cell

  43. Cell Transport • osmosis

  44. Cell Transport • osmosis

  45. Cell Transport • osmosis

  46. Cell Transport • osmosis

  47. Essential Question Cell Be able to differentiate between the types of cell transport. 11.7.2007

  48. Transport facilitated diffusion molecules move across membrane with help of transport proteins Cell

  49. Transport active transport uses energy to transport molecules against concentration gradient Cell

  50. Transport active transport uses energy to transport molecules against concentration gradient Cell

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