osmosis. transport mechanisms passive transport (doesnt require energy) diffusion facilitated...
TRANSCRIPT
![Page 1: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/1.jpg)
Osmosis
![Page 2: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/2.jpg)
Transport mechanisms
Passive transport (doesn’t require energy) Diffusion Facilitated diffusion Osmosis Filtration
Active transport (uses energy from ATP)Active transportBulk transport
} Movement down a concentration gradient
![Page 3: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/3.jpg)
3. OsmosisDiffusion of water molecules
through a selectively permeable membrane,
from an area of high water potential
to an area of low water potential
NB: Water potential gradient is opposite to solute concentration gradient.
High water potential = low solute concentration
![Page 4: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/4.jpg)
Concentration Gradient
Water Potential Gradient
![Page 5: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/5.jpg)
Membrane is impermeable to large sugar moleculesbut permeable to small water molecules
![Page 6: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/6.jpg)
Selectively permeable membrane
H2O
![Page 7: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/7.jpg)
Why is OSMOSIS important for living organisms?
• Osmo-regulation - maintaining the right levels of water in cells is vital for life.
• HOMEOSTASIS – maintain balance / equilibrium
• Water moves between cells in a multi-cellular organism
Water balance
COPY
![Page 8: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/8.jpg)
Passive transport
• http://www.youtube.com/watch?v=sdiJtDRJQEc&feature=related (osmosis, 1 min)
• http://www.youtube.com/watch?v=JShwXBWGMyY (passive transport, 5 min)
![Page 9: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/9.jpg)
Transport mechanisms
Passive transport (doesn’t require energy) Diffusion Facilitated diffusion Osmosis Filtration
Active transport (uses energy from ATP)Active transportBulk transport
} Movement down a concentration gradient
![Page 10: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/10.jpg)
2. Active transport
• Uses chemical energy from ATP
• Move molecules against the concentration gradient (low conc. high conc.)
![Page 11: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/11.jpg)
![Page 12: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/12.jpg)
Tonicity is a relative term
• Hypotonic Solution - lower concentration than another solution
• Hypertonic Solution - higher concentration than another solution
• Isotonic Solution - both solutions have same concentration
![Page 13: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/13.jpg)
Shriveled
TurgidFlaccidPlasmolysed
Normal Lysed
HYPOTONICISOTONICHYPERTONIC
ANIMAL CELL
PLANTCELL
![Page 14: Osmosis. Transport mechanisms Passive transport (doesnt require energy) Diffusion Facilitated diffusion Osmosis Filtration Active transport (uses energy](https://reader037.vdocuments.mx/reader037/viewer/2022102923/5517bc1a550346892b8b4833/html5/thumbnails/14.jpg)
ISOTONIC HYPERTONIC HYPOTONIC
NORMAL EXPANDEDSHRIVELED