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Active and Passive Transport

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Active and Passive Transport

Postby AlisaAndersen » Thu Mar 18, 2010 10:27 pm

There are 3 questions I am wondering about, and I need help really fast. :(

1. Complete a concept map about passive transport using the following words or phrases: osmosis, energy, facilitated diffusion, the movement of molecules from high to low concentration, diffusion. (I included of what has been drawn out so far of the map)

2. Predict: If the transport proteins that carry amino acids into a cell stopped working, how might the process affect the cell?

3. Infer: What might you conclude about the membrane structure of the final vesicle formed during exocytosis and the cell membrane?

Those are the only things that I am having problems with, so I really hope someone could help me with these! :)
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Here is the Concept Map outline that i have to fill in for #1.
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Postby mith » Fri Mar 19, 2010 3:07 am

google passive transport?
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Postby sunghoo » Sat Mar 20, 2010 8:13 pm

requires no energy
Examples:
Xylem in plants
Diffusion in plasma membrane
Countercurrent Exchange of fish gills
I don't know what the bottem part wants...
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Postby AlisaAndersen » Tue Mar 23, 2010 12:46 am

Thank you for the help! I tried to google this, but nothing specific would come up. :-)
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Postby david23 » Tue Mar 23, 2010 4:09 am

Oh wow someone actually replied to their own homework post. Just for that I'll help ya. Ok Alisa the answer to this are in the definitions of the terms (osmosis, energy, facilitated diffusion, the movement of molecules from high to low concentration, diffusion.)

So which ones do you know already
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Postby AlisaAndersen » Tue Mar 23, 2010 2:18 pm

Oh perfect! The way you describe it, it makes sense to me. So knowing that I can finish my work! :-)

I know that osmosis is the diffusion of a solvent through a semipermeable membrane from a dilute to a more concentrated solution.

Energy is the ability or power to do work.

Facilitated diffusion is the diffusion of substances across a biological membrane by means of membrane-spanning carrier molecules that transport substances that otherwise wold diffuse slowly or not at all.

Diffusion is the random movement of molecules from an area of high concentratin to an area of low concentration.

And for "the movement of molecules from high to low concentration" would that pretty much say that it is Diffusion?
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Postby sunghoo » Sun Mar 28, 2010 6:45 pm

Yes, you are right, if you want to get deeper into why, try looking up water potential.
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Postby AlisaAndersen » Sun Mar 28, 2010 6:56 pm

Oh okay! Thanks for the help! :)
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Postby Jinky » Mon Aug 22, 2011 6:39 am

That's a rather confusing map!!! I have no idea how to do it! But your comments helped me a lot to clear out the task. I did it because of my curiosity:)
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