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5 Written questions

5 Matching questions

  1. hypotonic
  2. phagocytosis
  3. ion channel
  4. exocytosis
  5. facilitated diffusion
  1. a the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.
  2. b a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
  3. c the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
  4. d describes a solution whose solute concentration is lower than the solute concentration inside a cell.
  5. e 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.

5 Multiple choice questions

  1. the bursting of a cell.
  2. a protein that transports substances across a cell membrane.
  3. a 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.
  4. in protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.
  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. active transportthe movement of chemical substances, usually across the cell membrane, against a concentration gradient; requires cells to use energy.

          

  2. concentration gradientin protists, an organelle that accumulates water and then releases it periodically to maintain osmotic pressure.

          

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

          

  4. turgor pressurethe pressure that is exerted on the inside of cell walls and that is caused by the movement of water into the cell.

          

  5. endocytosisthe 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.

          

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