Download - Explain what is happening in this clip
![Page 1: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/1.jpg)
Explain what is happening in this clip.
![Page 2: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/2.jpg)
Objective:Objective: You will be able You will be able to explain how molecules to explain how molecules
move across a semi-move across a semi-permeable membrane due to permeable membrane due to
a concentration gradient.a concentration gradient.
Diffusion & OsmosisDiffusion & Osmosis
![Page 3: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/3.jpg)
DiffusionDiffusion
The movement of molecules The movement of molecules from an area in which they from an area in which they
are highly concentrated to an are highly concentrated to an area in which they are less area in which they are less
concentrated. concentrated.
![Page 4: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/4.jpg)
See an animation of See an animation of diffusion here:diffusion here:
http://lewis.eeb.uconn.eduhttp://lewis.eeb.uconn.edu/lewishome/applets/Diffusi/lewishome/applets/Diffusion/diffusion.htmlon/diffusion.html
![Page 5: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/5.jpg)
How did the lab illustrate How did the lab illustrate diffusion? Explain or draw diffusion? Explain or draw
a diagrama diagram
![Page 6: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/6.jpg)
OsmosisOsmosis
The diffusion of The diffusion of waterwater across across a selectively permeable a selectively permeable
membranemembrane..
![Page 7: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/7.jpg)
OsmosisOsmosis
Water moves from a high Water moves from a high concentration of water (less salt or concentration of water (less salt or
sugar dissolved in it) to a low sugar dissolved in it) to a low concentration of water (more salt or concentration of water (more salt or sugar dissolved in it). This means sugar dissolved in it). This means
that water would cross a selectively that water would cross a selectively permeable membrane from a dilute permeable membrane from a dilute solution (less dissolved in it) to a solution (less dissolved in it) to a
concentrated solution (more concentrated solution (more dissolved in it).dissolved in it).
![Page 8: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/8.jpg)
http://www.usd.edu/~bgoodman/Osmos.htm
What happens when the What happens when the concentration of water differs on concentration of water differs on
both sides of a membrane?both sides of a membrane?
![Page 9: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/9.jpg)
See an animation of See an animation of osmosis here:osmosis here:
http://lewis.eeb.uconn.eduhttp://lewis.eeb.uconn.edu/lewishome/applets/Osmos/lewishome/applets/Osmosis/osmosis.htmlis/osmosis.html
![Page 10: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/10.jpg)
Animal cells in WATERAnimal cells in WATER In this picture a red blood In this picture a red blood
cell is put in a glass of cell is put in a glass of distilled water (all water distilled water (all water with no salt or sugar in it). with no salt or sugar in it). Because there is a higher Because there is a higher concentration of water concentration of water outside the cell, water outside the cell, water enters the cell by enters the cell by OSMOSISOSMOSIS. In this case too . In this case too much water enters and the much water enters and the cell swells to the point of cell swells to the point of bursting open. In the end bursting open. In the end pieces of cell membrane pieces of cell membrane are left in the water. are left in the water.
![Page 11: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/11.jpg)
Normal Distilled water Salt water
Isotonic cells Hypotonic cellsHypertonic cells
![Page 12: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/12.jpg)
Define selectively Define selectively permeable membrane permeable membrane
![Page 13: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/13.jpg)
Selectively permeable membraneSelectively permeable membrane
A membrane that allows only A membrane that allows only certain materials to cross it certain materials to cross it
Materials pass through Materials pass through porespores in the membranein the membrane
![Page 14: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/14.jpg)
For more information on For more information on diffusion & osmosis, click diffusion & osmosis, click
here:here:
http://edtech.clas.pdx.edu/osmosis_thttp://edtech.clas.pdx.edu/osmosis_tutorial/default.htmlutorial/default.html
![Page 15: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/15.jpg)
Why are osmosis & Why are osmosis & diffusion important?diffusion important?
![Page 16: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/16.jpg)
Why are osmosis & diffusion Why are osmosis & diffusion important?important?
All living things have certain requirements All living things have certain requirements they must satisfy in order to remain alive – they must satisfy in order to remain alive – maintain maintain homeostasishomeostasis
These include exchanging gases (usually These include exchanging gases (usually CO2 and O2), taking in water, minerals, CO2 and O2), taking in water, minerals, and food, and eliminating wastes. and food, and eliminating wastes.
These tasks happen at the cellular level.These tasks happen at the cellular level. Molecules move through the cell Molecules move through the cell
membrane by diffusionmembrane by diffusion
![Page 17: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/17.jpg)
Why are osmosis & diffusion Why are osmosis & diffusion important?important?
All living things have certain All living things have certain requirements they must satisfy in requirements they must satisfy in order to remain alive. These include order to remain alive. These include exchanging gases (usually CO2 and exchanging gases (usually CO2 and O2), taking in water, minerals, and O2), taking in water, minerals, and food, and eliminating wastes. These food, and eliminating wastes. These tasks ultimately occur at the cellular tasks ultimately occur at the cellular level, and require that molecules level, and require that molecules move through the membrane that move through the membrane that surrounds the cell. surrounds the cell.
![Page 18: Explain what is happening in this clip](https://reader030.vdocuments.mx/reader030/viewer/2022020800/56812dd3550346895d931b17/html5/thumbnails/18.jpg)
Why are osmosis & diffusion Why are osmosis & diffusion important?important?
This membrane is a complex This membrane is a complex structure that is responsible for structure that is responsible for separating the contents of the cell separating the contents of the cell from its surroundings, for controlling from its surroundings, for controlling the movement of materials into and the movement of materials into and out of the cell, and for interacting out of the cell, and for interacting with the environment surrounding with the environment surrounding the cell. the cell.