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Home Q & A Board Biology-Related Homework Help General Biology
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purpleberry purpleberry
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7 years ago
A pitcher throws a baseball by lowering the forearm to straighten the arm. During this movement, the biceps muscle ________ and the triceps muscle ________.
A) contracts; relaxes
B) relaxes; contracts
C) relaxes; relaxes
D) contracts; contracts
Textbook 
Biology: Science for Life with Physiology

Biology: Science for Life with Physiology


Edition: 5th
Authors:
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cameronicameroni
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purpleberry Author
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#2
6 years ago
Thanks for helping me with this
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