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5 Written questions

5 Matching questions

  1. ion channel
  2. cytolysis
  3. exocytosis
  4. osmosis
  5. pinocytosis
  1. a a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
  2. b 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.
  3. c 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.
  4. d the bursting of a cell.
  5. e a method of active transport across the cell membrane in which the cell takes in extracellular fluids.

5 Multiple choice questions

  1. describes a solution whose solute concentration is higher than the solute concentration inside a cell.
  2. the pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
  3. the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
  4. the process by which a cell membranes surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
  5. a cell that ingests and destroys (digests) foreign matter or microorganisms.

5 True/False questions

  1. diffusionthe movement of particles from regions of higher density to regions of lower density.

          

  2. carrier proteinthe pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.

          

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

          

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

          

  5. phagocytosisthe process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.