Osmosis Worksheet: Analyze cell behavior in different salt solutions.

Let's solve this Osmosis Worksheet step by step. We are given six diagrams, each showing either an animal cell (circle) or a plant cell (rectangle) in a beaker with a solution of a certain salt concentration. The cells themselves have a salt concentration of 0.8%, and we need to determine:

- A. Whether the external solution is hypertonic, hypotonic, or isotonic relative to the cell.
- B. The direction of water movement: into the cell, out of the cell, or in and out equally.
- C. What happens to the cell (e.g., swell, lyse, shrink, plasmolyze, remain unchanged), considering differences between animal and plant cells.

---

🔬 Key Concepts:

- Hypertonic: Solution has higher solute concentration than the cell → Water moves out of the cell.
- Hypotonic: Solution has lower solute concentration than the cell → Water moves into the cell.
- Isotonic: Equal solute concentration → Water moves in and out equally.
- Animal cells:
- No cell wall.
- In hypotonic: swell and burst (lyse).
- In hypertonic: shrink (crenate).
- In isotonic: remain unchanged.
- Plant cells:
- Have a rigid cell wall.
- In hypotonic: swell and become turgid (but don’t burst).
- In hypertonic: lose water, plasmolyze (cell membrane pulls away from cell wall).
- In isotonic: flaccid (no pressure, but not shriveled).

---

Now let’s analyze each diagram.

---

1. Animal Cell in 10% Salt Solution

- Cell: 0.8% salt
- Solution: 10% salt → much higher
- A. Hypertonic (solution has more solute)
- B. Water moves out of the cell
- C. Animal cell will shrink (crenate)

✔ Answers:
- A. Hypertonic
- B. Out of the cell
- C. Shrink (crenate)

---

2. Animal Cell in 0% Salt Solution

- Cell: 0.8%
- Solution: 0% → pure water → very low solute
- A. Hypotonic
- B. Water moves into the cell
- C. Animal cell will swell and burst (lyse)

✔ Answers:
- A. Hypotonic
- B. Into the cell
- C. Swell and lyse

---

3. Animal Cell in 0.8% Salt Solution

- Cell: 0.8%
- Solution: 0.8% → equal
- A. Isotonic
- B. Water moves in and out equally
- C. Cell remains unchanged

✔ Answers:
- A. Isotonic
- B. In and out equally
- C. Remains unchanged

---

4. Plant Cell in 0.8% Salt Solution

- Cell: 0.8%
- Solution: 0.8% → equal
- A. Isotonic
- B. Water moves in and out equally
- C. Plant cell becomes flaccid (no turgor pressure)

✔ Answers:
- A. Isotonic
- B. In and out equally
- C. Flaccid (no change in shape, but no turgor)

---

5. Plant Cell in 15% Salt Solution

- Cell: 0.8%
- Solution: 15% → much higher
- A. Hypertonic
- B. Water moves out of the cell
- C. Plant cell will plasmolyze (cell membrane pulls away from cell wall)

✔ Answers:
- A. Hypertonic
- B. Out of the cell
- C. Plasmolyze

---

6. Plant Cell in 0.2% Salt Solution

- Cell: 0.8%
- Solution: 0.2% → lower solute
- A. Hypotonic
- B. Water moves into the cell
- C. Plant cell will become turgid (swells due to water intake, but cell wall prevents bursting)

✔ Answers:
- A. Hypotonic
- B. Into the cell
- C. Become turgid

---

✔ Final Answers Summary:

| Diagram | Cell Type | A. Tonicity | B. Water Movement | C. Cell Response |
|--------|-----------|------------------|----------------------------|--------------------------------------|
| 1 | Animal | Hypertonic | Out of the cell | Shrink (crenate) |
| 2 | Animal | Hypotonic | Into the cell | Swell and lyse |
| 3 | Animal | Isotonic | In and out equally | Remains unchanged |
| 4 | Plant | Isotonic | In and out equally | Flaccid |
| 5 | Plant | Hypertonic | Out of the cell | Plasmolyze |
| 6 | Plant | Hypotonic | Into the cell | Become turgid |

---

Let me know if you'd like this formatted for printing or as a filled-in worksheet!