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5 Written questions

5 Matching questions

  1. Cell Membrane Function: 6 materials a membrane prevents from entering the cell
  2. Protein position within a membrane:
    Peripheral proteins
  3. Bulk Transport
  4. Three Types of Passive Transport
  5. Transport Across Cell Membranes: Selective Transport
  1. a the use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins
  2. b ...
  3. c - salts - atoms - viruses
    - sugar - ions - bacteria
    - proteins (7? this is what was in the notes)
    most organelles are surrounded by membranes with the same structure as a cell membrane
  4. d Peripheral proteins are partially embedded in the inside or outside surface of the membrane
  5. e the movement of only certain substances across the cell membrane

5 Multiple choice questions

  1. have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.
  2. medication can be placed in a flat transdermal patch that sticks to the skin. A semi-permeable membrane lining the inner surface allows drugs to diffuse out of the patch at a slow, constant rate.
  3. Vesicle transports contents
    Vacuole stores the ingested material
  4. a) phagocytosis - when cells "eat" by taking in large particles or other cells
    b) pinocytosis - when cells "drink" by taking in droplets of fluid
  5. movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients

5 True/False questions

  1. Hypotonic solution,has a lower concentration of solute compared to inside the cell

          

  2. Two types of transport proteinshave 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.

          

  3. Cell Membrane Function: A Biological BarrierCell membranes are semi-permeable allowing some materials to cross, while excluding others. They can select a) by particle size
    - small enough to enter membrane - O2 H2O
    - too large to cross - sugar
    b) particular materials to transport across (they bind to chemicals based on their size shape or charge)

          

  4. Membranes at Work 2. Kidney Dialysishave 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.

          

  5. Plasmolysisthe cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.

          

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