Countercurrent gas exchange in the gills of a fish
a. maintains a...

Question

Countercurrent gas exchange in the gills of a fish
a. maintains a gradient that enhances diffusion.
b. enables the fish to obtain oxygen without swimming.
c. means that blood and water flow at different rates.
d. allows O2 to diffuse against its partial pressure gradient

Accepted Answer

Hello everyone and welcome to today's video. So today we have the which of the following organs is most efficient in breathing underwater. Well, in order to solve this question we're going to think about in the following way. What do organisms that breathe underwater usually have? And this is going to be gilles? Well, why do they have gills? Water has a very low oxygen content and we're talking about less Than 1% oxygen. This is a lot less than organisms that are over water because of these organisms are underwater, require that the respiratory organs have a very large surface area. And this is something that gilles can provide because of this. The organ that is most efficient for breathing underwater is going to be answer choice B gills. I really hope this video helped you and I hope to see you on the next one.

Countercurrent gas exchange in the gills of a fish a. maintains a gradient that enhances diffusion. b. enables the fish to obtain oxygen without swimming. c. means that blood and water flow at different rates. d. allows O2 to diffuse against its partial pressure gradient

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