Lecture #3 Cells

  1. Hypotonic
    when the solute is less than water
  2. Cytoplasm
    all the components in between the plasma membrane and the nucleus
  3. Hypertonic
    solute is greater than water
  4. Cytoskeleton
    maintains cell structure
  5. Passive Transport Process
    Simple and facilitated diffusion, osmosis
  6. Endoplasmic Reticulum
    moves ribosomes to the golgi; network of folded membranes
  7. Cytosol
    fluid containing water and dissolved subtances
  8. Transcription
    DNA copies into RNA message
  9. Pagocytosis
    destroys, kills
  10. Solvent
    Dissolving liquid (the liquid is doing the dissolving)
  11. Exocytosis
    pushing out material from inside the cell to outside the cell.  Think: EXocytosis ; EXit
  12. Cell Divison
    Replacing an old cell
  13. Translation
    mRNA is translated to make a protein (cytoplasm)
  14. Microfilaments
    Inside cell membrane to support and maintain shape
  15. Concentration
    amount of solute in a solvent
  16. Solute
    dissolving material
  17. Endocytosis
    bringing material IN to the cell
  18. Concentration Gradient
    difference in two areas of a solution
  19. What are 3 types of cell division
    • 1.Interphase
    • 2.Mitosis
    • 3. Cytoskenesis
  20. Interphase
    DNA doubles
  21. Mitosis
    division of the nucleus-nuclei
  22. Cytokinesis
    division of cytoplasm (cell movement)
  23. Plasma Membrane Structure
    phospholipid bilayer; polar heads, non polar tails
  24. Plasma Membrane Structure
    barrier between inside and outside of cell; controls what enters and leaves
  25. Membrane Protein
    • Ion Channel; specific ions pass
    • Transport; shape changes
    • Receptor; allows special molecules
    • Cell Identity maker; recognizes eachother
  26. Centroiles
    microtubules emanate from these structures
  27. Centrosome
    important in cell division; near nucleus
  28. Micro-tubules
    movement limbs; inside cilia and flagella
  29. Ribosomes
    Site of protein synthesis; makes energy; high content of RNA located in cytosol, ER, mitochondria
  30. Rough ER
    site of protein synthesis for export
  31. Smooth ER
    no ribosomes; where lipids and steroids are made
  32. Golgi Appartatus
    modifies, transports and packages protein to transport
  33. Lysosomes
    contains digestive enzymes; recycles cell parts
  34. Autophagy
    worn out organelles are digested
  35. Autolysis
    destroys entire cell
  36. Mitochondria
    Power house of the cell; provides most of the cells ATP; where cell energy is made
  37. Nucleus
    Control center of the cell; contains DNA
  38. Nucleolus
    site of ribosome formation
  39. Nuclear Membrane
    Allows movement in and out of the nucleus; has pores
  40. What are 3 types of protein synthesis?
    • Transcription
    • Translation
    • Cell Division
  41. Plasma Membrane Function
    regulates what enters and leaves the cell
Card Set
Lecture #3 Cells
definitions for different organelles and their functions