PLEASE HELP!!!

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ConfusedKid
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PLEASE HELP!!!

Post by ConfusedKid » Mon Feb 26, 2007 5:24 pm

Hi every one.

Im _at_ skool, doing triple award science ( 3 science GCSE's) and I need help on some biology stuff. What I need to know is about diffusion.

I need to know... How concentration gradient is matained in the a) lungs b) small intestine c) placenta and d) leaf.

Please help as soon as possible... Thanks

Aimee

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mith
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Post by mith » Mon Feb 26, 2007 6:20 pm

Textbook? If you don't have one buy one and read it.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

ConfusedKid
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?!

Post by ConfusedKid » Mon Feb 26, 2007 6:22 pm

I have but it doesnt answer my question... and there is nothing about it online either!

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mith
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Post by mith » Mon Feb 26, 2007 9:17 pm

Well if you search concentration gradient and those 4 terms it wouldn't help much, you need to be more specific. Figure out what substance is involved in the concentration gradient(might be more than 1). Look on wikipedia.com for those 4 tissues, figure out their function and what substance needs to be diffused.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

ConfusedKid
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Thanks

Post by ConfusedKid » Tue Feb 27, 2007 4:12 pm

thanks mith you helped alot!!

thank you

:lol:

ConfusedKid
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Bio Test

Post by ConfusedKid » Fri Mar 02, 2007 4:59 pm

OkiDoki.... ive got ANOTHER :roll: biology exam on monday and its all about population,evolution, adaption endangered species etc... has ne1 got ne tips or nefin that mite help? also.. there are apparently alot of question about whales?? dont know why.. but anyway.. any tips will be appreciated.. thanks :D

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mith
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Post by mith » Fri Mar 02, 2007 6:14 pm

whales are an example of evolution :D
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

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AstusAleator
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Post by AstusAleator » Fri Mar 02, 2007 8:37 pm

If you browse through the evolution and ecology forums, you might find some useful info. Also, check out the tutorials from this site.
What did the parasitic Candiru fish say when it finally found a host? - - "Urethra!!"

ConfusedKid
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Post by ConfusedKid » Sun Mar 04, 2007 3:06 pm

Thanks guys i'll try that

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blabajubajoo
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Post by blabajubajoo » Wed Mar 14, 2007 6:24 pm

Books are usually really good has anyone heard of a library ar are we all computer geeks

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