Across
- 4. organism whose cells contain a nucleus
- 5. in a molecule, uneven distribution of electrons (results in (+) and (-) poles) ex. water
- 7. strong, supporting layer around the cell membrane in some cells
- 9. a process by which liquid droplets are ingested by living cells; it is one type of endocytosis
- 13. network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement
- 15. weak attraction between a hydrogen atom and another atom
- 16. force of attraction between different kinds of molecules
- 18. a microscope with high magnification that uses electron beams in place of light
- 19. a microscopic hair-like tail used by cells and microorganisms for movement (usually only 1 or 2)
- 20. when the concentration of two solutions is the same
- 22. a process through which bulk amounts of specific molecules can be imported into a cell after binding to cell surface receptors.
- 24. microscopic, hair-like projections on the surfaces of some cells and of certain organisms (many)
- 25. tiny sacs that transport material within or outside the cell.
- 26. the process by which cells move materials out of the cell
- 28. when comparing two solutions, the solution with the lesser concentration of solutes
- 30. fluid portion of the cell outside the nucleus
- 32. process of diffusion in which molecules pass across the membrane through cell membrane channels
- 33. unicellular organism that lacks a nucleus
Down
- 1. the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C)
- 2. property of biological membranes that allows some substances to pass across it while others cannot; also called semi permeable membrane
- 3. thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell
- 6. microscope that uses multiple lenses and light to enlarge the image of a sample
- 8. cellular transport where substances move against a concentration gradient. (requires energy)
- 10. process by which solids are ingested by living cells; it is another type of endocytosis
- 11. the process by which cells move materials from within the cell into the extracellular fluid.
- 12. cell organelle that stores materials such as water, salts, proteins, and carbohydrates
- 14. attraction between molecules of the same substance
- 17. diffusion of water through a selectively permeable membrane
- 21. process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
- 23. tendency of water to rise in a thin tube
- 27. when comparing two solutions, the solution with the greater concentration of solutes
- 29. fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cells
- 31. cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can used by the rest of the cell