Campbell Biology: Concepts & Connections (9th Edition)
Campbell Biology: Concepts & Connections (9th Edition)
9th Edition
ISBN: 9780134296012
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 22, Problem 4TYK

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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