Cell Terminology

3. Type of transport where movement of materials across the membrane doesn't require energy
5. Type of transport where materials move against a concentration difference; requires energy
6. Group of tissues working together
7. Located near the nucleus and helps to organize cell division; not found in plant cells
10. Cell that has free-floating DNA and few organelles
11. Thin barrier surrounding a cell
13. The powerhouse of the cell
17. Internal membrane system that helps with protein synthesis and the creation of membrane lipids
19. Relatively constant internal physical and chemical conditions
21. Large membrane-enclosed structure that contains the cell’s genetic material
22. Small organelles filled with enzymes that function as the cell's cleanup crew
23. Small particles of RNA and protein found throughout the cytoplasm in all cells
25. Group of cells that performs a similar function

1. Large, saclike, membrane-enclosed structure used for storage
2. Cell that encloses its DNA in a nucleus and has membrane-bound organelles
4. Type of diffusion in which molecules use protein channels to cross a membrane they wouldn't ordinarily be able to cross
8. Stack of flattened membranes that prepares substances for storage or removal from the cell
9. The process of taking material into the cell by means of infoldings, or pockets in the cell membrane
12. the process by which particles move from an area of high concentration to an area of low concentration
14. The fluid portion of the cell outside the nucleus
15. Network of protein filaments; made of microtubules and microfilaments
16. Strong supporting layer around the cell membrane
18. Organelle that captures the energy from sunlight and converts it into food
20. Membrane of the vacuole surrounding the material fuses with the cell membrane, forcing the contents out of the cell
24. The diffusion of water through a selectively permeable membrane