chapter 2.1

2. the first person to see living cells under a microscope
3. the cell membrane is built of a double layer
4. oxygen moved into a concentrating heart muscle. No energy is required
7. glucose enters a liver cell through a protein channel. No engery is required
9. a large organism is made up of many millions of
12. controls the materials that move into and out of a cell
13. compound light microscopes focus light through
15. water molecules moves out of the skin cells of a person swimming in a freshwater pond. No energy
16. what is the cell's nucleus filled with
17. a nerve cell uses energy to pump sodium out of the cell into a sodium rich enviorment
18. uses energy to pick up specific molecules and carry them across the cell membrane
20. the ability to distinguish two nearby objects
21. a cells function can include obtaining food and water and getting rid of
22. the cell membrane changes shape to engulf a particle

1. facilitated diffusion moves large molecules through
5. ribosomes are made in the
6. an organism that is made of one cell is what type of organism
8. where photosynthesis occurs
10. the scientist who determined that all animals are made of cells
11. allows large particles to leave the cell
14. describes how cells are related to living things
19. occurs when a cell engulfs large food particles to bring them into the cell