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eMusic Study Pack • Biology
Student
📖 Comprehensive Note
Osmosis is the movement of water molecules across a selectively permeable membrane from a region of higher water potential (more dilute) to a region of lower water potential (more concentrated).
- Only solvent (water) moves; solutes remain largely on their side of the membrane.
- Osmosis is driven by differences in water potential (concentration) across the membrane.
- Important in plant hydration (turgidity), wilting (flaccidity), and plasmolysis.
- In animal cells (e.g., red blood cells) osmosis causes swelling (hypotonic) or shrinking (hypertonic).
🎤 Lyrics + Audio
Verse 1
Water moves from high to low, a flow so free,
Through a membrane that lets it be.
No solutes pass, just water in motion,
Balancing cells — that’s the magic potion!
Chorus
os- mo- sis...
Osmosis is the movement of water molecules from
a region of higher water potential - dilute solution)uhh
to a region of lower water potential - concentrated solution)
through a selectively permeable membrane.
Verse 2
Plant roots absorb water from the ground,
Leaves stay firm and stems stand sound.
Red blood cells swell or shrink in style,
In different solutions, they change a while.
Chorus
os- mo- sis...
Osmosis is the movement of water molecules from
a region of higher water potential - dilute solution)uhh
to a region of lower water potential - concentrated solution)
through a selectively permeable membrane. (2x
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📊 Line-by-Line Study Guide
| Lyric Line | Explanation |
|---|---|
| Water moves from high to low, a flow so free | Water moves from higher water potential (more dilute) to lower (more concentrated). |
| Through a membrane that lets it be | Occurs across a selectively permeable membrane that allows water but not certain solutes through. |
| No solutes pass, just water in motion | Only solvent (water) moves in osmosis, balancing concentration differences. |
| Red blood cells swell or shrink in style | In hypotonic solutions RBCs swell; in hypertonic they shrink (crenate). |
| Plant roots absorb water from the ground | Roots use osmosis to take up water into root hair cells (important for turgor). |
💡 Mnemonic
"Osmosis = Only Solvent Moves" — Remember: water (solvent) moves to equalize concentrations; solutes mostly stay put.
❓ Quiz
1. Which way does water move in osmosis?
2. What moves across the membrane during osmosis?
3. What happens to a red blood cell in pure water?
🃏 Flashcards
Q1: Define osmosis.
Movement of water from high water potential to low through a selectively permeable membrane.
Q2: What is water potential in plain terms?
A measure of how freely water can move; dilute solutions have higher water potential.
Q3: Give one biological example of osmosis.
Plant roots absorbing groundwater; red blood cells changing size in different solutions.
🎯 Drag & Drop – Osmosis Lyrics
Drag each label to the correct lyrics:
Lyrics Block A
Water moves from high to low, a flow so free,
Through a membrane that lets it be.
No solutes pass, just water in motion,
Balancing cells — that’s the magic potion!
Water moves from high to low, a flow so free,
Through a membrane that lets it be.
No solutes pass, just water in motion,
Balancing cells — that’s the magic potion!
Lyrics Block B
os-mo-sis...
Osmosis is the movement of water molecules from
a region of higher water potential (dilute solution)
to a region of lower water potential (concentrated solution)
through a selectively permeable membrane.
os-mo-sis...
Osmosis is the movement of water molecules from
a region of higher water potential (dilute solution)
to a region of lower water potential (concentrated solution)
through a selectively permeable membrane.
Lyrics Block C
Plant roots absorb water from the ground,
Leaves stay firm and stems stand sound.
Red blood cells swell or shrink in style,
In different solutions, they change a while.
Plant roots absorb water from the ground,
Leaves stay firm and stems stand sound.
Red blood cells swell or shrink in style,
In different solutions, they change a while.
Verse 1
Chorus
Verse 2
📌 Summary
- Osmosis moves water from high to low water potential across a selectively permeable membrane.
- Drives important processes in plants (turgor) and animals (cell volume changes).
- Understanding hypotonic/hypertonic/isotonic helps predict cell behavior in solutions.