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5 Written questions

5 Matching questions

  1. ion channel
  2. carrier protein
  3. osmosis
  4. active transport
  5. diffusion
  1. a a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
  2. b a protein that transports substances across a cell membrane.
  3. c the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
  4. d the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated (of the solute) through a membrane that is permeable to the solvent.
  5. e the movement of particles from regions of higher density to regions of lower density.

5 Multiple choice questions

  1. a difference in the concentration of a substance across a distance.
  2. the process by which a substance is released from the cell through a vesicle that transports the substance to the cell surface and then fuses with the membrane to let the substance out.
  3. the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
  4. describes a solution whose concentration is equal to the solute concentration inside a cell.
  5. the bursting of a cell.

5 True/False questions

  1. plasmolysisthe diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated (of the solute) through a membrane that is permeable to the solvent.

          

  2. passive transportthe movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.

          

  3. sodium-potassium pumpa carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions into the cell.

          

  4. hypotonicdescribes a solution whose solute concentration is higher than the solute concentration inside a cell.

          

  5. contractile vacuolein protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.