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5 Written Questions

5 Matching Questions

  1. EXOCYTOSIS
  2. Cell Membrane Function: A Selective Filter
  3. Three Types of Passive Transport
  4. Types of Transport Across Membranes: Passive Transport
  5. Cell Membrane Structure
  1. a Cell 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)
  2. b Know and be able to label a phospholipid bilayer diagram
  3. c the reverse of endocytosis, whereby the membrane of vesicles or vacuoles fuses with the cell membrane and the stored contents are expelled from the cell.
  4. d ...
  5. e movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients

5 Multiple Choice Questions

  1. 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
  2. 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
  3. Peripheral proteins are partially embedded in the inside or outside surface of the membrane
  4. when the lysosome bursts and releases it's digestive enzymes into the cell resulting in cell destruction
  5. a state at which molecules are evenly distributed (the concentration is equal throughout the medium)
    - molecules continue moving but equilibrium is maintained

5 True/False Questions

  1. Three Types of Passive Transport 3.Facilitated Diffusionthe 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

          

  2. Three Types of Passive Transport 2.Osmosisthe diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)

          

  3. Bulk Transportthe movement of molecules and ions against the concentration gradient which requires ATP energy and carrier proteins to pump these molecules from an area of low solute concentration to an area of high solute concentration.

          

  4. Membranes at Work 3. Controlled Delivery of Medicationsmedication 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.

          

  5. Particle Model of Matterthe movement of molecules and ions against the concentration gradient which requires ATP energy and carrier proteins to pump these molecules from an area of low solute concentration to an area of high solute concentration.

          

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