NAME: ________________________

Homeostasis and Cell Transport Test

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5 Written Questions

5 Matching Questions

  1. pinocytosis
  2. carrier protein
  3. ion channel
  4. concentration gradient
  5. diffusion
  1. a the movement of particles from regions of higher density to regions of lower density.
  2. b a complex of protein molecules in a cell membrane that form a pore through which ions can pass.
  3. c a protein that transports substances across a cell membrane.
  4. d a method of active transport across the cell membrane in which the cell takes in extracellular fluids.
  5. e a difference in the concentration of a substance across a distance.

5 Multiple Choice Questions

  1. a cell that ingests and destroys (digests) foreign matter or microorganisms.
  2. the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food.
  3. the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.
  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. describes a solution whose concentration is equal to the solute concentration inside a cell.

5 True/False Questions

  1. vesiclea cell that ingests and destroys (digests) foreign matter or microorganisms.


  2. plasmolysisthe contraction or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis.


  3. 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.


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


  5. sodium-potassium pumpthe 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.


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