osmosis and active transport fill...
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Osmosis and Active Transport fill in.notebook
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September 26, 2013
TRANSPORTWe need to examine how these chemicals get in and out of the cell and we must
examine the various strategies that organisms use to do this effectively.
1. PASSIVE TRANSPORTA spontaneous physical process that doesnt need any of the _____________ __________________ to make it happen:
Two types: _______________ and _______________
2 TYPES:
_____________________________ is one of the most important organelles because it controls what goes in and out of the cell.
structure of the cell membrane allows it considerable control over the materials that enter of leave the cell, with the exception of waterthe cell membrance keeps the inside of the cell the same eventhough conditions outside the cells may change. The ability of the cell to maintain a stable internal environment is called _________________________________
The cell membrane is composed of a double layer of ___________________________________
________________________ (water LOVING) heads facing inside and outside of cell with _________________ (waterhating) tails between
able to migrate sideways, giving membrane a "FLUID" nature which allows it to seal itself when broken
__________ ways that materials can cross a cell membrane
Passive Transport, Active Transport and Bulk Transport
Osmosis and Active Transport fill in.notebook
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September 26, 2013
http://highered.mcgrawhill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html
DIFFUSIONDiffusion is a process by which a substance spontaneously spreads out in all directions from an area of ______ concentration to an area of _____ concentration over time. Cells have a selectively ____________ membrane which allows some substances to pass through and prevents others from passing through.
Osmosis and Active Transport fill in.notebook
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September 26, 2013
OSMOSISThe diffusion of __________ through a selectively permeable membrane from a region of ___________ concentration of water to _________concentration of water is called osmosis.
Passive transport does not use _________________ and goes with the concentration gradient. It could be through diffusion or osmosis.
2. ACTIVE TRANPORT uses _________________ because molecules are moving against the _______________________________ Purpose: rid of harmful or useless molecules
stockpile important moleculeseliminate certain substances
inside the cell that may be too large to simply diffuse to the outside
3. BULK TRANSPORT requires materials to be packaged in a vesicle and then moved through the membrane by exocytosis and endocytosis
http://www.youtube.com/watch?v=K7yku3sa4Y8
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September 26, 2013
Concentration Gradient:
Permeable membrane:
Semipermeable membrane
Nonpermeable membrane
Solvent
Solute
Isotonic
Hypertonic
Hypotonic
Endocytosis
Exocytosis
2. Find a picture of endocytosis and exocytosis and copy and paste it to a Word Document