Transport Through Membranes

N D
Mind Map by N D, updated more than 1 year ago
N D
Created by N D about 6 years ago
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National 5 Biology notes

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Transport Through Membranes
1 Passive Transport
1.1 Osmosis
1.1.1 It is the movement of water molecules from an area of high water concentration to an area of low water concentration through a selectively permeable membrane
1.1.2 Hypotontic
1.1.2.1 Higher water concentration
1.1.2.1.1 Plant: Turgid Animal: Burst
1.1.3 Hypertonic
1.1.3.1 lower water conentration
1.1.3.1.1 Plant: Plasmolysed Animal: Shrunk
1.1.4 Isotonic
1.1.4.1 equal water concentration
1.1.4.1.1 Plant: Normal Animal: Normal
1.2 Diffusion
1.2.1 The movement of a substance from an area of high concentration to an area of low concentration down a concentration gradient
1.2.2 Examples
1.2.2.1 Gas exchange for photosynthesis
1.2.2.2 Gas exchange at the avleoli
1.2.3 takes place in and out the cells
2 Active Transport
2.1 Requires energy to transport molecules against concentration gradient
3 Example of molecule that can't pass though the cell membrane
3.1 Startch
4 Example of molecule that can
4.1 Glucose
5 Selectively Permable
5.1 Allows passage of molecules according to size
5.1.1 If a molecule is too big to fit through the pore
5.1.1.1 Diffusion will not take place
5.1.2 If a molecule is small enough to fit through the pore
5.1.2.1 Diffusion across membrane
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