Across
- 4. Phospholipids can very easily do this within the membrane, at 10^7 times per second.
- 5. _____ proteins have a hydrophilic channel through the middle that lets polar molecules pass through.
- 11. These facilitate transport, enzyme activity, signal transduction, cell-cell recognition, intercellular joining, and attachment to the cytoskeleton and extracellular matrix.
- 12. Animals use this as a buffer against temperature change in their cell membranes.
- 13. A molecule with a higher amount of this quality will more easily move through the plasma membrane.
- 14. This is a model of the membrane, made up of lipids and proteins.
Down
- 1. A membrane with this characteristic only lets certain molecules through it.
- 2. The long lasting binding of cells.
- 3. _____ proteins change shape to transport molecules across the membrane.
- 6. These are attached to membrane proteins and allow for cell-cell recognition.
- 7. Water-loving.
- 8. A molecule with both a hydrophobic region and a hydrophilic region.
- 9. This characteristic of a membrane is vital for the cell to stay alive.
- 10. This is the outer living layer of a cell that acts as the interface between its internal contents and the external environment.