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5 Written questions

5 Matching questions

  1. Three Types of Passive Transport 3.Facilitated Diffusion
  2. Receptor - mediated endocytosi
  4. Membranes at Work 2. Kidney Dialysis
  5. Cell Membrane Function: 6 materials a membrane prevents from entering the cell
  1. a receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.
  2. b filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
  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 - 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
  5. e diffusion of molecules across the cell membrane by way of transport proteins.

5 Multiple choice questions

  1. when the lysosome bursts and releases it's digestive enzymes into the cell resulting in cell destruction
  2. Integral proteins extend through the entire bilayer and project from both surfaces
  3. the diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)
  4. has a lower concentration of solute compared to inside the cell
  5. have 3-D shapes that make them highly selective, recognizing atoms or molecules by shape, size or charge.

5 True/False questions

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


  2. 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)


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


  4. Transport Across Cell Membranes: Selective Transportthe movement of only certain substances across the cell membrane


  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


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