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5 Written questions

5 Matching questions

  1. Receptor - mediated endocytosi
  2. Isotonic solution
  3. Cell Membrane Function: 6 materials a membrane prevents from entering the cell
  4. Types of Transport Across Membranes: Passive Transport
  5. ENDOCYTOSIS
  1. a has 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
  2. b - 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
  3. c movement across cell membranes without an input of energy
    2 reasons molecules move.
    1. Brownian Motion
    2. Concentration gradients
  4. d the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.
  5. e receptors, like antennae, detect specific compounds or cells and bind with them, triggering endocytosis.

5 Multiple choice questions

  1. has a higher concentration of solute compared to the inside of the cell
  2. Loss of water in a plant cell resulting in WILTING
  3. a cell membrane prevents many materials from entering the cell.
  4. a) moving substances across the membrane
    b) carrying out chemical reactions (they act as enzymes)
    c) some have "marker" molecules (carbohydrate chains) on their surface allowing cells to recognize each other
    d) allow messenger molecules (such as hormones) to attach
    e) assist in cell-to-cell communication and control of cell functions
  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. Particle Model of Matterall matter is made of tiny particles

          

  2. EXOCYTOSISthe cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.

          

  3. Two types of Endocytosis:the cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.

          

  4. The Fluid-Mosaic Modelthe cell membrane forms a pocket around the material to be transported, then either pinches off as a vesicle or a vacuole.

          

  5. Protein position within a membrane:
    Integral proteins
    Peripheral proteins are partially embedded in the inside or outside surface of the membrane

          

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