Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 3 - Assess - Page 66: 6


D. Involves the use of ATP molecules.

Work Step by Step

ATP molecules provide the energy needed to move materials either with or against the direction of a concentration gradient via facilitated diffusion. Simple diffusion can only move materials with the concentration gradient.
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