bio notes

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Author:
jessicah
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130170
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bio notes
Updated:
2012-01-24 02:00:14
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bio notes
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cells
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  1. What is the difference between a eukariotic cell and a procariotic cell?
    • procariotic are simple and znd smaller with DNA floating in one loop suppounded by cytoplasm and ribosomes and plasmid. with a wall and a plasma membrane with flagella comming out the end. and phili comming out the sides.
    • eukariotic cells are much more complex with many organells and the dna is in the nucleus and the organells have condtructive walls. the dna is in the form of chromosomes or chromatid. they are much larger and have more ribosomes
  2. what is the cell theory?
    • -everything is made up of one or more cells
    • -cells come from other cells
    • -cells are the smallest unit of life
  3. name 3 functions of life (ex. homeostatis)
    • matabolize
    • growth
    • reproduction
    • responce
    • nutrience
  4. people who helped make the cell theory
    • in 1665 peter hooke named the cell when he was looking at cork under a microscope he made himslef.
    • Antonie can leeuwenhoek say the first living cell (sperm) a few years later and reffered to them as "animalcules"
  5. explain cell sizing.
    • - Volume grows a lot faster than its surface area
    • - When they get too big then they split into 2 or become flat.
    • -surface area is in quardination to the amount going in and out so how big it need to be.
    • -nerve cells don’t reproduce very fast. Some don’t at all.
    • -Skin cells reproduce rapidly. (Epithelial)
  6. an example of a stem cell
    embro, the meristematic tissue on spants, and the baby cord.
  7. what are stem cells and what are they used for
    stem cells are cells that have the potencial to be any kind of cell. this is used to recreate parts of people. they use stem cells to repare scarred tissues and such with burn victims and very commonly used for bone marrow
  8. the differences between plant and animal cells*
    • plants
    • -stores carbs such as starch
    • -exterior includes a cell wall with a plasma membrane
    • -do not contain centrioles within a centrosome area
    • -chloroplasts are present in the cytoplasm

    • animals
    • - stores carbs in the glycogen
    • -exterior only includes a plasma membrane
    • -contain centrosome area
    • -no chloroplasts
  9. Cell wall!!!
    what are the heads and tails called (hint like and dislike water)
    • head-hydrophobic phosphorylated alcahol heads
    • tail-hydrophobic region of fatty acids
  10. cell wall
    the things that move things from one some to the other is called?
    integral protein
  11. name 2 things that are in the cell mambrane
    glyocoprotein, integral protein, cholesterol
  12. cell wall!
    what are the head and tail layer called
    phospholipid layer
  13. which is polar and unpolar out of the head and tail?
    • head polar
    • tail unpolar
  14. how do light microscopes work?
    pass light threw living or dead things to form an image
  15. how does an elecrton microscope work?
    passing elecrtons threw to make an image
  16. hpw do prokariotic sells devide
    bionary fission
  17. explain the solidum-pottasium pump! this is an type of ACTIVE TRANSPORT
    • -protein open on the inside.
    • -sodium goes in.
    • -atm activatied
    • -breaks apart
    • -switches open sides
    • -pottasium goes in and sodium goes out
    • -the atm leaves
    • -the sides open switches

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