Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1259188132
ISBN 13: 978-1-25918-813-8

Chapter 46 - The Musculoskeletal System - Figure 46.19 - Inquiry Question - Page 976: 1

Answer

You should test the time that contraction strength lasts. Fast twitch fibers give fast, short duration contractions, while slow twitch give slowly rising, long lasting contractions. Muscles which are a mix of these two kinds of fibers have an intermediate time to maximal contraction and duration of contraction.

Work Step by Step

The key is to see Fig. 46.19--it shows the time for maximal strength of contraction and for duration of contraction for these three compositions of muscle.
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