1. Homeostasis Cell Transport

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3. What are the differences between diffusion & facilitated diffusion? need help

4. Explain when plasmolysis occurs.

5. During surgery, exposed tissues are moistened with sterile Ringer's solution to prevent shrinkage or lysis of the cells. Ringer's solution must be ___________ relative to cells in the tissue. Explain your answer.

6. Explain what each of the following substances requires in order to cross a membrane. water glucose sodium ion an amino acid

7. Explain the osmotic situations that the figure (at right) demonstrates? (Plasmolysis - turgor pressure – lysis) Is the extra-cellular fluid isotonic, hypertonic or hypotonic compared to the cell?

8. If a cell has a solute concentration of 0.07%,what osmotic situation of each of the following solutions would be? 1.0.01% solute 2.0.1% solute 3.1% solute 4.10% solute

9. What are the differences between facilitated diffusion and protein pumps?