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eMusic Study Pack • Biology
Student
📖 Comprehensive Note
Hypertonic solution — a solution with a higher solute concentration (and therefore lower water potential) than the cell interior. When a cell is placed in a hypertonic solution, water leaves the cell by osmosis (net movement from cell interior to outside).
- Plant cells: the cell membrane pulls away from the cell wall (plasmolysis), causing wilting and loss of turgor.
- Animal cells: cells shrink and become wrinkled (crenation), e.g., RBCs in concentrated saline.
- Osmosis is passive and driven by water potential differences.
🎤 Lyrics + Audio
Verse 1
When a cell is placed
in a hypertonic solution,
Water moves out of the
cell by osmosis into the
surrounding solution. Uh uh...
The cell loses water and
shrinks in motion.
All...In plant cells, this causes
the cell membrane to pull
away from the cell wall —
a process called plasmolysis.
oh oh oh oh...
In animal cells, it leads to crenation,
where the cell shrinks and
becomes wrinkled.
Chorus
A hypertonic solution is a
solution that has a higher
solute concentration and lower
water potential than the cell sap
of a living cell. Yea
Verse 2
A red blood cell placed in a
concentrated salt solution
will shrink due to water loss. Uh uh uh yea
All...In plant cells, this causes
the cell membrane to pull
away from the cell wall —
a process called plasmolysis.
oh oh oh oh...
In animal cells, it leads to crenation,
where the cell shrinks and
becomes wrinkled.
Chorus
A hypertonic solution is a
solution that has a higher
solute concentration and lower
water potential than the cell sap
of a living cell. Yea
outro
A hypertonic solution causes
water to move out of cells
by osmosis, leading to shrinkage,
crenation or plasmolysis — oh oh ... plasmolysis
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📊 Line-by-Line Study Guide
| Lyric Line | Explanation |
|---|---|
| Water moves out of the cell | Water leaves toward the region with higher solute concentration (lower water potential). |
| Cell loses water and shrinks | Loss of water reduces cell volume; animal cells crenate, plant cells plasmolyse. |
| Plasmolysis in plant cells | Membrane detaches from cell wall; can be reversible if cells are returned to hypotonic/isotonic conditions. |
| Red blood cell in concentrated salt | Cells undergo crenation (shrink, wrinkle) due to water loss. |
❓ Quiz
1. A hypertonic solution has:
2. What happens to plant cells in hypertonic solution?
3. Red blood cells in concentrated salt:
🃏 Flashcards
Q: Define hypertonic solution.
A solution with higher solute concentration (lower water potential) compared to the cell; water leaves cells by osmosis.
Q: What is plasmolysis?
The detachment of the plasma membrane from the cell wall caused by water loss in plant cells placed in hypertonic solutions.
🎯 Drag & Drop
Drag items into the correct box.
Effects
Not Hypertonic
Examples
Cell shrinks / crenation
Plasmolysis (plant cells)
RBC in concentrated salt
Cell swells
🔁 Quick
| Feature | Hypotonic | Hypertonic |
|---|---|---|
| Solute outside vs inside | Lower outside | Higher outside |
| Water movement | Into cell | Out of cell |
| Plant cell effect | Turgid | Plasmolysis |
| Animal cell effect | Haemolysis (burst) | Crenation (shrink) |
📌 Summary
- Osmosis moves water across a selectively permeable membrane toward higher solute concentration (lower water potential).
- Hypotonic: water enters cells → swelling/turgidity (plants) or haemolysis (animals).
- Hypertonic: water exits cells → shrinkage/crenation (animals) or plasmolysis (plants).
- These processes are passive and driven by water potential gradients.