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5 Written questions

5 Matching questions

  1. Protein position within a membrane:
    Peripheral proteins
  2. The activities of a living cell depend on the ability of its membrane to
  3. Two types of transport proteins
  4. Three Types of Passive Transport 2.Osmosis
  5. Receptor - mediated endocytosi
  1. a receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.
  2. b Peripheral proteins are partially embedded in the inside or outside surface of the membrane
  3. c 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. d the diffusion of water molecules across a membrane (water molecules move from where they are more highly concentrated to where they are less concentrated)
  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. Vesicle transports contents
    Vacuole stores the ingested material
  2. the use of vesicles to facilitate movement of substances that are too large to enter or exit the cell via transport proteins
  3. filters toxic wastes that accumulate in the blood while retaining necessary proteins, glucose, amino acids & ions
  4. a cell membrane prevents many materials from entering the cell.
  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. 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.


  2. Proteins in membranes serving the following functionsCell 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. 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


  4. Isotonic solutionhas a lower concentration of solute compared to inside the cell


  5. Hypertonic solutionhas a higher concentration of solute compared to the inside of the cell