Diffusion: Part 2 Objective: SWBAT classify solutions as isotonic, hypertonic, hypotonic SWBAT predict the movement of particles through a cell membrane Bellringer: Draw the solution at equilibrium.

What is happening here???

http://0.tqn.com/d/biology/1/0/5/4/diffuse.gif

The cell membrane has protein molecules acting as channels.

Diffusion Passive Diffusion Facilitated Diffusion Goes right through the bilayer Goes through a protein channel

Diffusion Passive Diffusion Facilitated Diffusion Small Large Uncharged Ex) Water, O2, CO2 Large Charged Ex) Sugar, Na+, Cl-

Facilitated Diffusion Diffusion that is helped by proteins in the cell membrane.

Facillitated Diffusion

Diffusion vs. Facilitated Diffusion

Isotonic Solution Ways to Compare Solutions There are equal amounts of molecules on both sides of the membrane Outside Inside

Hypotonic Solution Ways to Compare Solutions There are less molecules on outside of the membrane Outside Inside

Hypertonic Solution Ways to Compare Solutions There are more molecules on the outside of the membrane. Outside Inside

Diffusion Practice!