all of the following are examples of countercurrent exchange mechanisms except?? - (Apr/22/2010 )

:(all of the following are examples of countercurrent exchange mechanisms excep t:

a. heat exchange in the limbs of seals and whales.

b. heat exchange in the legs of wading birds

c. gas exchange in the gills of fish.

d. gas exchange in the alveoli of humans.

e. chloride transport in the loop of henle of humans



help please

Welcome to the BioForum, razormaniaa. We can help with some tough homework questions, but you must show us your effort -- we don't just give you the answer, we more help guide you there.

Which one do you think is correct, and why? Which ones do you know are not correct -- that is which ones do you know are examples of countercurrent exchange mechanisms?

I think that choice E would make total sense because its not being diffused across the membrane. The loop on henle is not permeable right?