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5 Written questions

5 Matching questions

  1. Transport Across Cell Membranes: Selective Transport
  2. Cell Membrane Function: Apoptosis
  3. The activities of a living cell depend on the ability of its membrane to
  4. Three Types of Passive Transport: 1. Diffusion
  5. Turgor pressure
  1. a the movement of only certain substances across the cell membrane
  2. b 1. transport raw materials into the cell (and out of)
    2. transport manufactured products and wastes out of the cell
    3. prevent unwanted matter from entering the cell
    4. prevent the escape of matter needed to perform cellular functions
  3. c 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
  4. d when the lysosome bursts and releases it's digestive enzymes into the cell resulting in cell destruction
  5. e The cell wall of a plant resists the pressure of a water-filled vacuole keeping the plant firm

5 Multiple choice questions

  1. the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
  2. a state at which molecules are evenly distributed (the concentration is equal throughout the medium)
    - molecules continue moving but equilibrium is maintained
  3. ...
  4. Loss of water in a plant cell resulting in WILTING
  5. each phospholipid molecule has a head that is hydrophilic (water-loving) and two tails that are hydrophobic (water-fearing)

5 True/False questions

  1. 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)


  2. 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.


  3. Isotonic solutionhas 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


  4. Protein position within a membrane:
    Peripheral proteins
    Integral proteins extend through the entire bilayer and project from both surfaces


  5. Types of Transport Across Membranes: Passive Transportmovement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients