Chapter 2 (Part 1)

2. facilitated dffusion moved large molecules through ___
4. the process by which large molecules are engulfed by a cell
6. basic unit of structure and function in living things
8. a large structure that directs a cells functions
11. a widely accepted explanation of the relationship between cells and living things
12. microscopes use beams of electrons to produce magnified objects
13. tiny cell structure that carry out specific functions in the cell
15. the storage area of a cell
19. the cell's nucleus is filled with ___
21. proposed that new cells are formed only from cells that already exists. "All cells come from other cells"
22. the process by which molecules tend to move from an area of high to low concentration
24. uses energy to pick up specific molecules and caryy them across the cell membrane during active transport
25. ability to distinguish details on the object

1. instruments that can magnify very small objects
3. the process by which water moves across a selectively permeable membrane.
5. concluded than all animals are made of cells
7. compound microscopes focus on light though ___ to produce a magnified image
9. first person to see living cells under a microscope
10. the condition when objects appear larger than they appear
14. a nerve cells uses energy to pump sodium out of the cell into a sodium-rich environment
16. controls the materials what goes in and out
17. the process by which large molecules are expelled from a cell
18. first to see dead cells
20. cell membrane is built of a double layer of ___
23. a cell's function can include obtaining food and water and getting rid of ___