Human Biology, 14 Edition

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

Chapter 13 - Assess - Page 282: 9



Work Step by Step

Option a. is correct. Fast-twitch fibers are lighter in color because they have fewer mitochondria in them. Option b. and c. are correct. The way in which fast-twitch fibers generate energy through anaerobic means by way of the fermentation and creatine phosphate pathways. Option d. is correct. Fast-twitch fibers generate energy for quick bursts of energy such as during a sprint. Therefore, option e is correct.
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