1. Diffusion & Osmosis

2. THE CELL MEMBRANE AND THE FLUID MOSAIC THEORY - explain how food And gases enter and leave the cell Flip flop theory Explains how water goes in and out

3. DIFFUSION – TO GO FROM AN AREA OF GREATER CONCENTRATION TO AN AREA OF LESSER CONCENTRATION AREA OF GREATER CONCENTRATION AREA OF LESSER CONCENTRATION

4. OSMOSIS IS THE MOVEMENT OF WATER MOLECULES FROM AN AREA OF GREATER CONCENTRATION TO AN AREA OF LESSER CONCENTRATION

6. THE FILE ABOVE IS JUST AN ANIMATED GIF FILE THIS IS AN AREA HOLDING BLOOD & OTHER MOLECULES IN BLOOD PLASMA, AND AN AREA WHERE URINE IS COLLECTED. THESE 2 AREAS ARE SEPARATED BY A SEMI - PERMEABLE MEMBRANE SIMILAR TO THE MEMBRANE AND SEPARATION THAT OCCURS IN YOUR KIDNEYS. urine blood

8. Active transport explains what happens when the cell uses ENERGY To transport something across the cell membrane Low to high

9. PINOCYTOSIS IS THE INGESTION OF DISSOLVED MATERIALS BY ENDOCYTOSIS. THE PLASMA MEMBRANE INDENTS IN AND PINCHES OFF PLACING DROPLETS OF FLUID IN A PINOCYTIC VESICLE. THE LIQUID CONTENTS OF THE VESICLE ARE THEN SLOWLY TRANSFERRED INTO THE CYTOPLASM

10. EXOCYTOSIS IS A PROCESS IN WHICH AN INTRACELLULAR VESICLE MOVES TO THE PLASMA MEMBRANE AND SUBSEQUENT FUSION OF THE VESICLES MEMBRANE AND THE CELL MEMBRANE OCCURS…

11. LEVELS OF ORGANIZATION

12. Define Diffusion

13. The movement of molecules from a area in which they are highly concentrated to a area in which they are less concentrated.

14. Diffusion

15. See an animation of diffusion here: http://lewis.eeb.uconn.ed u/lewishome/applets/Diffu sion/diffusion.html http://lewis.eeb.uconn.ed u/lewishome/applets/Diffu sion/diffusion.html

16. Define osmosis

17.  The diffusion of water across a selectively permeable membrane.

18. Define osmosis  Water moves from a high concentration of water (less salt or sugar dissolved in it) to a low concentration of water (more salt or sugar dissolved in it). This means that water would cross a selectively permeable membrane from a dilute solution (less dissolved in it) to a concentrated solution (more dissolved in it). http://www.usd.edu/~bgoodman/Osmos.htm

19. Define osmosis

20.  In this picture a red blood cell is put in a glass of distilled water (all water with no salt or sugar in it). Because there is a higher concentration of water outside the cell, water enters the cell by OSMOSIS. In this case too much water enters and the cell swells to the point of bursting open. In the end pieces of cell membrane are left in the water. http://www.usd.edu/~bgoodman/Osmos.htm

21. See an animation of osmosis here: http://lewis.eeb.uconn.ed u/lewishome/applets/Osm osis/osmosis.html http://lewis.eeb.uconn.ed u/lewishome/applets/Osm osis/osmosis.html

22. Define selectively permeable membrane

23.  A membrane that allows only certain materials to cross it  Materials pass through pores in the membrane

24. For more information on diffusion & osmosis, click here: http://edtech.clas.pdx.edu/osmosis_ tutorial/default.html http://edtech.clas.pdx.edu/osmosis_ tutorial/default.html

25. Why are osmosis & diffusion important?

26.  All living things have certain requirements they must satisfy in order to remain alive – maintain homeostasis  These include exchanging gases (usually CO2 and O2), taking in water, minerals, and food, and eliminating wastes.  These tasks happen at the cellular level.  Molecules move through the cell membrane by diffusion

27. Why are osmosis & diffusion important?  All living things have certain requirements they must satisfy in order to remain alive. These include exchanging gases (usually CO2 and O2), taking in water, minerals, and food, and eliminating wastes. These tasks ultimately occur at the cellular level, and require that molecules move through the membrane that surrounds the cell.

28. Why are osmosis & diffusion important?  This membrane is a complex structure that is responsible for separating the contents of the cell from its surroundings, for controlling the movement of materials into and out of the cell, and for interacting with the environment surrounding the cell.

29. Review Osmosis & Diffusion Here: http://wappingersschools.org/W JH/teachers/science/Jim_Site/as ignments/cells/diffusionetc/diffu sion_osmosis.html http://wappingersschools.org/W JH/teachers/science/Jim_Site/as ignments/cells/diffusionetc/diffu sion_osmosis.html http://wappingersschools.org/W JH/teachers/science/Jim_Site/as ignments/cells/diffusionetc/diffu sion_osmosis.html http://wappingersschools.org/W JH/teachers/science/Jim_Site/as ignments/cells/diffusionetc/diffu sion_osmosis.html