Facilitated Diffusion - A Biology Project (skit)

Facilitated Diffusion

Facilitated diffusion (or facilitated transport) is a process of diffusion, a form of passive transport facilitated by transport proteins. The facilitated diffusion may occur either across biological membranes or through aqueous compartments of an organism.

Polar molecules and charged ions are dissolved in water but they can not diffuse freely across cell membranes due to the hydrophobic nature of the lipids that make up the lipid bilayers. Only small nonpolar molecules, such as oxygen can diffuse easily across the membrane. All polar molecules should be transported across membranes by proteins that form transmembrane channels. These channels are gated so they can open and close, thus regulating the flow of ions or small polar molecules. Larger molecules are transported by transmembrane carrier proteins, such as permeases that change their conformation as the molecules are carried through, for example glucose or amino acids.

Non-polar molecules, such as retinol or fatty acids are poorly soluble in water. They are transported through aqueous compartments of cells or through extracellular space by water-soluble carriers as retinol binding protein. The metabolites are not changed because no energy is required for facilitated diffusion. Only permease changes its shape in order to transport the metabolites. The form of transport through cell membrane which modifies its metabolites is the group translocation transportation.
-source-wikipedia

Category:

Comedy

Tags:

• parody

[DragonScythe]

ahhhh, reupload this alan

[vangchild]

lol omg, this is totally cool! :)

[emokallellover]

the old man is representing something (such as glucose) entering a cell, but it needs something like a protein (the guards) to get into the cell. The boss is something (such as water) that needs to get into the cell but doesn't need proteins or whatever to get in.

[hudene]

the old man is representing how active transport works, i'm guessing? For passive, the molecule is able to go by with ease[the 1st guy], for active transport [the old guy], it must be accompanied by a type of protein. my bio is a little rusty

[inspiration02]

i don't get it...

what was the old man representing?

and the guards?

and the boss?

if you could explain that to me that would be great. thanks :)

it looks like it would be a really good analogy :)

[madelynirisscene]

i love you for this.

really, i do.

i wasn't paying attention in biology...

and we have a chapter test tomorrow. =S

thank you so much!

i completely understand it now!

--madelyn! =]