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5 Written questions

5 Matching questions

  1. Bulk Transport
  2. Turgor pressure
  3. Cell Membrane Function: Apoptosis
  4. Membranes at Work 3. Controlled Delivery of Medications
  1. a 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.
  2. b the use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins
  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 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. - salts - atoms - viruses
    - sugar - ions - bacteria
    - proteins (7? this is what was in the notes)
    most organelles are surrounded by membranes with the same structure as a cell membrane
  2. has a higher concentration of solute compared to the inside of the cell
  3. 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
  4. a) phagocytosis - when cells "eat" by taking in large particles or other cells
    b) pinocytosis - when cells "drink" by taking in droplets of fluid
  5. movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients

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


  3. 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


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


  5. Transport proteinsThe cell wall of a plant resists the pressure of a water-filled vacuole keeping the plant firm