Cells

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Across
  1. 6. a homogenous mixture of two or more components.
  2. 7. difference in hydrostatic (fluid) pressure that drives filtration.
  3. 8. the substance present in the largest amount in a solution.
  4. 9. the division of the cell nucleus; often followed by division of the cytoplasm of a cell.
  5. 13. a small fluid-filled sac formed by membrane.
  6. 14. tiny, hairlike projections on cell surfaces that move in a wavelike manner.
  7. 15. the diffusion of water (a solvent) through a membrane from a dilute solution into a more concentrated one.
  8. 16. the scientific theory stating that a cell is the structural and functional unit of life, the activity of an organism depends on the activities of its cells, a cell's structure determines its functions, and cells are the basis for reproduction.
  9. 19. the ingestion of solid particles by cells.
  10. 20. refers to molecules, or portions of molecules, that interact only with nonpolar molecules.
  11. 22. area where plasma membranes of neighboring cells are tightly bound together, forming an impermeable barrier.
  12. 23. the passive process by which molecules and ions move from areas of high concentration to areas of low concentration.
  13. 25. below normal tone or tension.
  14. 26. passive transport process driven by a concentration gradient and requiring a membrane protein to act as a carrier or channel.
  15. 27. method for the movement of substances from the cell interior to the extracellular space as a secretory vesicle fuses with the plasma membrane.
  16. 28. having a uniform tension; of the same tone.
  17. 29. the passive process of forcing water and solutes through a membrane using a fluid pressure gradient.
Down
  1. 1. the nucleic acid that contains ribose; acts in protein synthesis.
  2. 2. a barrier, such as a membrane, allows some substances through and excludes others.
  3. 3. excessive, above normal, tone or tension.
  4. 4. a difference in amount of a substance between two areas.
  5. 5. means by which fairly large extracellular molecules or particle enter cells.
  6. 7. the engulfing of extracellular fluid by cells.
  7. 10. long, whiplike extensions of the cell membrane of some bacteria and sperm; serve to propel the cell.
  8. 11. the process of making a second copy of cellular DNA before the cell divides.
  9. 12. refers to molecules, or portions of molecules, that interact with water and charged particles.
  10. 17. net movement of a substance across a membrane against a concentration or electrical gradient; requires release and use of cellular energy.
  11. 18. the dissolved substance in a solution.
  12. 21. the spreading of particles in a gas or solution with a movement toward uniform distribution of particles; also called simple diffusion.
  13. 24. the phase of a cell's life cycle when it reproduces itself.