1. Section 8.3 and 8.4 Practice Problems

2. In your notebook, draw a circle (CELL) inside of a large box (OUTSIDE OF CELL).
You will indicate the SOLUTE with DOTS.
You will indicate MOVEMENT with ARROWS.

3. A cell is sitting in a solution
A cell is sitting in a solution. The solution (outside) is HYPERTONIC compared to the cell.
With arrows, show where the SOLUTE would move.
What process is this?

4. 2. A cell is sitting in a solution. The cell is HYPERTONIC
2. A cell is sitting in a solution. The cell is HYPERTONIC compared to the solution (outside).
The SOLUTE cannot pass through the membrane. What will pass through instead?

5. With arrows, show where the WATER would move.
What process is this?
Would this cause the cell to increase or decrease in size?

6. 3. A cell is sitting in a solution. The cell is HYPOTONIC
3. A cell is sitting in a solution. The cell is HYPOTONIC compared to the solution (outside).
With arrows, show where the WATER would move.
What process is this?
Would this cause the cell to increase or decrease in size?

7. 4. A cell is sitting in a solution. The cell is HYPERTONIC to
4. A cell is sitting in a solution. The cell is HYPERTONIC to the solution (outside).
Draw arrows to show ACTIVE TRANSPORT.

8. 5. A cell is sitting in a solution. The cell and solution are ISOTONIC.

9. The relatively constant internal physical and chemical conditions that all organisms must maintain to survive is
Osmosis
Endocytosis
Homeostasis
Exocytosis

10. Solute particles move from an area of higher concentration to an area of lower concentration in a process called
Diffusion
Osmosis
Transport
Equilibrium

11. Large molecules, such as glucose, move across cell membranes through special protein channels during
Active transport
Facilitated diffusion
Osmosis
Bulk transport

12. Explain why cells are almost always hypertonic to freshwater.

13. Which type of organism consists of specialized cells?
Multicellular prokaryotes
Multicellular eukaryotes
Unicellular prokaryotes
Unicellular eukaryotes

14. All unicellular organisms
are prokaryotes.
are bacteria.
reproduce.
have a nucleus.

15. Describe the levels of organization in a multicellular organism.
In general, how do cells in a multicellular organism communicate?