osmosis/cell diffusion questions...any help appreciated.

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biohope
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osmosis/cell diffusion questions...any help appreciated.

Post by biohope » Wed Oct 19, 2005 5:41 pm

what affect does temperature have on the rate of diffusion?

by what process does water leave a salt-treated Elodea cell?

in terms of temperature change, why might one substance travel at a different rate than another?

i been trying to figure these out but i cant, its the only 3 questions i cant find, anyone have any answers? thanks

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Poison
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Post by Poison » Wed Oct 19, 2005 6:02 pm

I think you can find them too. Looks like homework.
Last edited by Poison on Wed Oct 19, 2005 6:08 pm, edited 1 time in total.
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Post by MrMistery » Wed Oct 19, 2005 6:02 pm

They are very easy. I can't believe that you were unable to find the answers. Your book is a real piece of sh*t if it doesn't have these things. :D :D :D Anyway, here are the answers:
1. diffusion increases as temperature increases
2. osmosis
3. well, even if the substances are transported at the same temperature, the smaller the molecule, the faster it will be transported. Also, the bigger the concentration gradient, the faster it will be transported.

Please let me know if you don't understand something
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Post by biohope » Wed Oct 19, 2005 6:48 pm

ohh ok that makes sense...since the post i got 1 and 2 on my own but 3 was still kind of confusing me. thanks a lot.

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Post by Peter Mundy » Wed Oct 19, 2005 7:00 pm

MrMistery wrote:diffusion increases as temperature increases


Examiners would look for;

"The RATE of diffusion increases as temperature increases"

The reason I have pointed this out is because a friend said diffusion increases, and got no marks for the question. While I put the same thing except with rate of diffusion increases and got the mark.

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Post by biohope » Wed Oct 19, 2005 7:10 pm

Peter Mundy wrote:
MrMistery wrote:diffusion increases as temperature increases


Examiners would look for;

"The RATE of diffusion increases as temperature increases"

The reason I have pointed this out is because a friend said diffusion increases, and got no marks for the question. While I put the same thing except with rate of diffusion increases and got the mark.
yeah ill be specific and say rate of diffusion. i guess just saying diffusion would be too general for some teachers to accept. thanks for the advice

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Post by MrMistery » Thu Oct 20, 2005 5:54 pm

That is a stupid thing to do(what the teacher did) since the goal of a test would be to see if the student knows or not. And your friend deffinetly knew the answer. But i suppose it would be more correct to say the rate of diffusion...
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Post by Peter Mundy » Thu Nov 10, 2005 12:19 am

Yes, but in england during the exam this type of question would be brought up in. You would not get the mark without saying "rate." Our teacher is just trying to get us into good habits so we do not throw away easy marks.

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