PLEASE HELP!!!

[ConfusedKid]

Hi every one.

Im @ 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

[mith]

Textbook? If you don’t have one buy one and read it.

[ConfusedKid]

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

[mith]

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.

[ConfusedKid]

thanks mith you helped alot!!

thank you

😆

[ConfusedKid]

OkiDoki…. ive got ANOTHER 🙄 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 😀

[mith]

whales are an example of evolution 😀

[AstusAleator]

If you browse through the evolution and ecology forums, you might find some useful info. Also, check out the tutorials from this site.

[ConfusedKid]

Thanks guys i’ll try that

[blabajubajoo]

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

[Author]

Posts