770365
Transport
Through
Membranes
- Passive
Transport
- Osmosis
- 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
- Hypotontic
- Higher water
concentration
- Plant: Turgid
Animal: Burst
- Plant: Turgid
Animal: Burst
- Higher water
concentration
- Hypertonic
- lower water
conentration
- Plant: Plasmolysed
Animal: Shrunk
- Plant: Plasmolysed
Animal: Shrunk
- lower water
conentration
- Isotonic
- equal water
concentration
- Plant: Normal
Animal: Normal
- Plant: Normal
Animal: Normal
- equal water
concentration
- 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
- Diffusion
- The movement of a
substance from an area of
high concentration to an area
of low concentration down a
concentration gradient
- Examples
- Gas exchange for
photosynthesis
- Gas exchange
at the avleoli
- Gas exchange for
photosynthesis
- takes place in
and out the cells
- The movement of a
substance from an area of
high concentration to an area
of low concentration down a
concentration gradient
- Osmosis
- Active Transport
- Requires energy to transport molecules
against concentration gradient
- Requires energy to transport molecules
against concentration gradient
- Example of molecule that can't
pass though the cell membrane
- Startch
- Startch
- Example of
molecule that can
- Glucose
- Glucose
- Selectively Permable
- Allows passage
of molecules
according to size
- If a molecule is too big
to fit through the pore
- Diffusion will not take place
- Diffusion will not take place
- If a molecule is
small enough to fit
through the pore
- Diffusion across membrane
- Diffusion across membrane
- If a molecule is too big
to fit through the pore
- Allows passage
of molecules
according to size
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