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5 Written questions

5 Matching questions

  1. hypotonic
  2. equilibrium
  3. osmosis
  4. carrier protein
  5. active transport
  1. a the movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.
  2. b in biology, a state that exists when the concentration of a substance is the same throughout a space.
  3. c describes a solution whose solute concentration is lower than the solute concentration inside a cell.
  4. d a protein that transports substances across a cell membrane.
  5. e 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 Multiple choice questions

  1. the movement of substances across a cell membrane without the use of energy by the cell.
  2. describes a solution whose concentration is equal to the solute concentration inside a cell.
  3. the pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.
  4. the movement of particles from regions of higher density to regions of lower density.
  5. the contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis.

5 True/False questions

  1. vesiclea small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell.


  2. cytolysisthe bursting of a cell.


  3. ion channela method of active transport across the cell membrane in which the cell takes in extracellular fluids.


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


  5. exocytosisthe 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.