Jump to content
Sign in to follow this  

Homework Help protein channels)

Recommended Posts

so i have to make an analogy of protein channels of a a cell.

based on like house stuff, like sewage, doors windows like that..

but i honestly still don't get it. in the membrane structure chapter, theres only somethign about phospholipids and cholesterol.

please help thanks

Share this post

Link to post
Share on other sites

Protein Channels are ones implanted in the plasma membrane. As you already know the membrane has 2 poles, hydrophobic and hydrophilic. The hydrophobic being the lipid part (the middle of the membrane).

There are 3 ways of substance transport through the membrane:

  1. Simple diffusion: basically going through directly with no problems.
  2. Facilitated diffusion: using protein transports
  3. Active transport: using protein pumps.


Hydrophilic (water-loving) molecules can't go through by simple diffusion because the inside of the membrane is hydrophobic. Think about it this way, the inside of the membrane hates water, so it wont allow any water-loving substance to go through it so it'll just keep pushing them out. The channel proteins make channels across the membrane of which the inside is hydrophilic. The channel has no problem letting the hydrophilic particles in because well...it loves water too, and the inside of the membrane doesn't have a problem with it because the hydrophilic substances aren't getting anywhere near it. That is facilitated diffusion.

I tried to explain this as simply as I can, I hope it made sense.

As for the analogy, you can use your imagination now that you understand the concept. Off the top of my head, a person can't go through the wall because well...they just can't break through..they need a door. That's a very poor example but you get the point.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.