Unit 3 Biology Vocab

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Across
  1. 2. Uses energy (ATP) to move sodium outside the cell and potassium inside the cell AGAINST the concentration gradient
  2. 5. Recognize and bind to other substances outside the cell
  3. 9. A thin, flexible bilayer of phospholipids and proteins
  4. 13. Identify the cell to the surrounding environment
  5. 14. Movement from high to low concentration through a semipermeable membrane
  6. 16. The movement of molecules AGAINST the concentration gradient (from low to high concentration). This requires the cell to use energy
  7. 17. A vesicle inside the cell merges with the cell membrane and releases molecules outside the cell
  8. 18. Two layers of phospholipids that make up the cell membrane
  9. 19. Movement across the cell membrane that does not require energy
  10. 20. Carrier proteins help molecules diffuse without using any of the cell’s energy
  11. 21. the process of maintaining needed internal conditions (chemical balance, temperature, pH, etc.)
  12. 23. Help move large materials across the cell membrane
  13. 25. Doesn’t mix (“fears”) with water
Down
  1. 1. Molecules spreading out evenly (moving from hi to lo concentration)
  2. 3. Mixes with (“loves”) water
  3. 4. Help cells carry out needed chemical reactions
  4. 6. Allows only certain molecules to enter and exit the cell
  5. 7. Breaking glucose into ATP. Happens in plants and animals.
  6. 8. use energy to grab molecules and push them in or out of the cell
  7. 10. The cell membrane forms a pouch around molecules, and then absorbs the pouch into the membrane, releasing the molecules into the cell
  8. 11. Captures energy from sunlight, providing the energy for almost all life
  9. 12. The distribution of molecules across a space.
  10. 15. are hollow and let certain materials pass through their middle
  11. 22. Lipid made of a phosphate group and two fatty acids
  12. 24. Adenosine triphosphate. The main form of energy for cells in ALL living things.