Transport Acorss Cell Membranes

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Across
  1. 3. A molecule that forms the bilayer of the cell membrane.
  2. 4. Describes molecules or parts of molecules that attract water.
  3. 7. The movement of molecules against the concentration gradient using energy.
  4. 10. The passive movement of molecules from a high to a low concentration.
  5. 11. The movement of molecules across the membrane without energy input.
  6. 12. A property of a membrane that allows some substances to pass through but not others.
Down
  1. 1. Tiny openings in the membrane that allow small molecules to pass through.
  2. 2. Describes molecules or parts of molecules that repel water.
  3. 5. The movement of water molecules across a selectively permeable membrane.
  4. 6. The difference in concentration of a substance across a space.
  5. 8. A structure that allows specific molecules to pass through the membrane.
  6. 9. The point at which molecules are evenly distributed across a membrane.