Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 11 - 11.3 - Concept Check - Page 222: 4

Answer

These gated calcium channels allow calcium ions from internal stores to diffuse into the cytosol, raising the calcium ion concentration there.

Work Step by Step

Calcium is normally kept at a low concentration, by energy-consuming pumps, in the cytosol so that it can serve as an obvious signal when its concentration rises due to the action of these channels.
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