Cells Vocabulary

4. that move materials across cell membranes and are essential for the life and growth of all living things
5. transport across a membrane that DOES NOT require energy (diffusion or osmosis); moves from high concentration to low concentration
8. the smallest unit of life, smallest organism that can meet the 7 characteristics of life
11. transport across a membrane that requires energy and a protein pump to move molecules from low to high concentration
13. organelle that is responsible for controlling all cellular activities; control center or brain of the cell
17. The arrangement of parts in an organism
18. passive transport of any substance across a semipermeable cell membrane
19. a thread-like structure found in the nucleus of animal and plant cells that contains part or all of an organism's genetic material
20. the ability ro allow certain molecules to enter or exit the cell while keeping others in or out

1. made of fatty acids and glycerol, they are the units that build cell membranes or boundaries
2. process by which organisms maintain a relatively stable internal environment
3. device that produces magnified images of structures that are too small to see with the unaided eye
6. specialized organelles in eukaryotic cells that have a single or double layer of lipids surrounding them
7. The activity, role, value or purpose of a part, activity, or trait of an organism; the job a structure or part performs
9. passive transport across a membrane through a protein channel that does not require energy
10. small, circular piece of DNA located in the cytoplasm of many bacteria
12. membrane that contains the cell and separates the inside of the cell from its surroundings
14. unicellular or multicellular organisms that DO have a nucleus and specialized membrane bound organelles
15. small, unicellular primitive organisms that do not contain a nucleus or membrane bound organelles
16. small specialized structure within a cell