IB Biology HL SL Unit 3B
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- 2020.06.02
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- 2018.01
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"IB Biology HL SL Unit 3B"에 대한 내용입니다.
목차
1. Simple Diffusion: net movement from higher to lower concentration of solute across membranes (down the concentration gradient CG)
2. Facilitated Diffusion: net movement from higher to lower concentration of solute across membranes (down the concentration gradient CG)
3. Osmosis: net movement of water molecules across a semi-permeable membrane from a region of low solute concentration to a region of high solute concentration (until equilibrium is reached) or region of high Water Potential to a region of low Water Potential
4. IB Questions
본문내용
Simple Diffusion: net movement from higher to lower concentration of solute across membranes (down the concentration gradient CG)
- In a living system, diffusion often involves a membrane
- Non-polar molecules like oxygen diffuse easily
- Polar molecules can only diffuse at low rates due to their partial positive and negative charges.
(Recall: inner portion of the phospholipid bilayer is mostly hydrophobic, non-polar tails)
Polar-polar (like dissolves like)
NP-NP dissolve or pass through
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