UNIT 3

2. tiny sacs that transport material within or outside the cell.
4. groups of cells that work together (same job)
5. cells can develop in different ways to have different features to help them carry out a special task to help the organism function
8. groups of organs and tissues that work together
10. 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
11. a microscope with high magnification that uses electron beams in place of light
13. when comparing two solutions, the solution with the greater concentration of solutes
16. thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell
17. basic unit of life
18. process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
19. organism whose cells contain a nucleus
21. when the concentration of two solutions is the same
24. a process by which liquid droplets are ingested by living cells; it is one type of endocytosis
25. the process by which cells move materials from within the cell into the extracellular fluid.
26. when comparing two solutions, the solution with the lesser concentration of solutes
27. unicellular organism that lacks a nucleus

1. property of biological membranes that allows some substances to pass across it while others cannot; also called semi permeable membrane
2. cell organelle that stores materials such as water, salts, proteins, and carbohydrates
3. fluid portion of the cell outside the nucleus
6. process by which solids are ingested by living cells; it is another type of endocytosis
7. cell organelle that breaks down lipids, carbohydrates, and proteins into small molecules that can used by the rest of the cell
9. the process by which cells move materials out of the cell
12. network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement
14. microscope that uses multiple lenses and light to enlarge the image of a sample
15. process of diffusion in which molecules pass across the membrane through cell membrane channels
17. strong, supporting layer around the cell membrane in some cells
20. group of tissues that work together
22. diffusion of water through a selectively permeable membrane
23. cellular transport where substances move against a concentration gradient. (requires energy)