Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 48 - 48.2 - Concept Check - Page 1070: 1


This can be done by utilizing active transport or an electrical gradient.

Work Step by Step

Without some other force to override it, the chemical gradient would prevent ions from flowing in this direction. Active transport uses energy to physically move ions through the membrane in transport proteins, and an electrical gradient of greater magnitude than the chemical gradient can supersede the chemical gradient.
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