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5 Written questions

5 Matching questions

  1. Protein position within a membrane:
    Peripheral proteins
  2. Phospholipid bilayer
  3. Hypertonic solution
  4. Three Types of Passive Transport
  5. Cell Membrane Function: A Selective Filter
  1. a each phospholipid molecule has a head that is hydrophilic (water-loving) and two tails that are hydrophobic (water-fearing)
  2. b has a higher concentration of solute compared to the inside of the cell
  3. c ...
  4. d Peripheral proteins are partially embedded in the inside or outside surface of the membrane
  5. e 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)

5 Multiple choice questions

  1. Vesicle transports contents
    Vacuole stores the ingested material
  2. The cell wall of a plant resists the pressure of a water-filled vacuole keeping the plant firm
  3. 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. 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. 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. Transport Across Cell Membranes: Equilibriuma state at which molecules are evenly distributed (the concentration is equal throughout the medium)
    - molecules continue moving but equilibrium is maintained


  2. Membranes at Work 2. Kidney Dialysisfilters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions


  3. Cell Membrane StructureKnow and be able to label a phospholipid bilayer diagram


  4. PlasmolysisLoss of water in a plant cell resulting in WILTING


  5. 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