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5 Written questions

5 Matching questions

  1. Types of Transport Across Membranes: Passive Transport
  2. Active Transport
  3. Cell Membrane Function: A Biological Barrier
  4. Particle Model of Matter
  5. The activities of a living cell depend on the ability of its membrane to
  1. a a cell membrane prevents many materials from entering the cell.
  2. b all matter is made of tiny particles
  3. c the 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. d movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients
  5. e 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

5 Multiple choice questions

  1. Loss of water in a plant cell resulting in WILTING
  2. 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
  3. when the lysosome bursts and releases it's digestive enzymes into the cell resulting in cell destruction
  4. 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.
  5. uses pressure to force contaminated water through a membrane with fine pores that will not allow bacteria, salts, and other dissolved molecules through, resulting in water with fewer impurities

5 True/False questions

  1. Transport Across Cell Membranes: Equilibriumthe movement of only certain substances across the cell membrane

          

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

          

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

          

  4. 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

          

  5. The Fluid-Mosaic ModelCell membrane molecules are in constant motion (drifting past each other) resulting in:
    a) membrane flexibility
    b) cell's ability to change shape