Answer
The triceps control this movement.
Work Step by Step
Rather than propelling yourself downwards, you are fighting gravity to lower yourself more slowly than its pull. Pulling with your biceps would just propel you down faster.
Campbell Biology (10th Edition)
by Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Published by
Pearson
ISBN 10:
0321775651
ISBN 13:
978-0-32177-565-8
Chapter 50 - 50.6 - Concept Check - Page 1130: 3
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