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5 Written Questions

5 Matching Questions

  1. Protein position within a membrane:
    Peripheral proteins
  2. Hypotonic solution,
  3. Bulk Transport
  4. Membranes at Work 3. Controlled Delivery of Medications
  5. Isotonic solution
  1. a Peripheral proteins are partially embedded in the inside or outside surface of the membrane
  2. b 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. c the use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins
  4. d has a lower concentration of solute compared to inside the cell
  5. e has the same solute concentration on both sides of the cell membrane. Equilibrium has been reached. EQUAL FLOW of water into and out of the cell

5 Multiple Choice Questions

  1. diffusion of molecules across the cell membrane by way of transport proteins.
  2. has a higher concentration of solute compared to the inside of the cell
  3. ...
  4. a) carrier proteins - facilitate the diffusion of glucose across the cell membrane
    b) channel proteins - have tunnel-like pores filled with water that allow charged ions in and out of the cell
  5. the net movement of particles from an area of high concentration to an area of low concentration
    - no energy is expended
    - in a cell very small particles can cross the cell membrane by moving between the phospholipid molecules

5 True/False Questions

  1. Brownian Motionhas the same solute concentration on both sides of the cell membrane. Equilibrium has been reached. EQUAL FLOW of water into and out of the cell

          

  2. 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)

          

  3. Phospholipid bilayerLoss of water in a plant cell resulting in WILTING

          

  4. Cell Membrane Structurethe use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins

          

  5. ENDOCYTOSISthe reverse of endocytosis, whereby the membrane of vesicles or vacuoles fuses with the cell membrane and the stored contents are expelled from the cell.

          

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