Cell Energy

4. _______ transport moves substances from areas of lower concentration to areas of higher concentration.
6. is the process in which organisms break down food to release energy.
8. A cell uses ________ to take in a substance too big to pass through the cell membrane.
10. Plants and some unicellular organisms obtain energy from ________
11. ________ transport uses the cell’s energy to move substances through a cell membrane.
15. The chemical reactions of photosynthesis occur in ____________, the organelles in plant cells that convert light energy into food.
17. A cell membrane is_________________, which means that it allows only certain substances to enter or leave a cell.
18. The second step of cellular respiration occurs in the mitochondria of eukaryotic cells. This step requires _________

1. Osmosis is the diffusion of ________ molecules only through a cell membrane.
2. ________ proteins are transport proteins that carry large molecules through the cell membrane.
3. is the process that releases energy without using oxygen.
5. Some types of bacteria and yeasts make ATP during ________ fermentation.
7. Facilitated diffusion occurs when molecules pass through a cell membrane using special proteins called ________ proteins.
9. _________ is the movement of substances from an area of higher concentration to an area of lower concentration.
12. The first step of cellular respiration, called glycolysis, occurs in the ________
13. A cell’s vesicles release their contents outside the cell during _________
14. For a cell to survive, its surface area must be large compared to its __________
16. __________ transport is the movement of substances through a cell membrane without using the cell’s energy.