PLEASE HELP!!!

February 26, 2007 at 5:24 pm #7041

Participant

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

February 26, 2007 at 6:20 pm #69482

mith

Participant

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

February 26, 2007 at 6:22 pm #69483

ConfusedKid

Participant

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

February 26, 2007 at 9:17 pm #69487

mith

Participant

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.

February 27, 2007 at 4:12 pm #69515

ConfusedKid

Participant

thanks mith you helped alot!!

thank you

😆

March 2, 2007 at 4:59 pm #69620

ConfusedKid

Participant

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 😀

March 2, 2007 at 6:14 pm #69623

mith

Participant

whales are an example of evolution 😀

March 2, 2007 at 8:37 pm #69624

AstusAleator

Participant

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

March 4, 2007 at 3:06 pm #69685

ConfusedKid

Participant

Thanks guys i’ll try that

March 14, 2007 at 6:24 pm #70008

blabajubajoo

Participant

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

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