Module 3: TRANSPORT ACROSS CELL MEMBRANES

Lecture 7: Questions

Questions:

  1. The transport method of neurotransmitters between nerve cells is:
    1.  Exocytosis
    2. Passive transport
    3. Receptor-mediated endocytosis
    4. Active transport
  2. Which of the following membrane activities does NOT require the expenditure of energy by the cell?
    1. Active transport
    2. Osmosis
    3. Endocytosis
    4. Exocytosis
    5. Synthesis of more membrane
  3. The membrane transport mechanism used when an amoeba engulfs a bacterial cell is called:
    1. Carrier-mediated facilitated diffusion
    2. Exocytosis
    3. Phagocytosis
    4. Pinocytosis
    5. Sodium-potassium pump
  4. A person has a genetic disease that prevents the phospholipids in the plasma membrane of the white blood cells from freely fusing with the other membranes within the cell. How would this disease affect phagocytosis?
    1. Lysosomes would not be formed
    2. Facilitated diffusion would not occur
    3. Lysosomes would be formed lacking hydrolytic enzymes
    4. The phagocytic vacuole would not fuse with the lysosome
    5. Endocytosis would not occur
  5. Pinocytosis:
    1. Is engulfment of large particles by the cell
    2. Occurs in protozoans and algae but not in more complex organisms
    3. Involves the specific binding of molecules to receptors on the cell surface
    4. Is the nonspecific uptake of fluids by pinching inward of the plasma membrane
    5. Is movement of molecules against the concentration gradient through a permeable membrane