When the leg extends at the knee, the prime mover is the rectus femoris therefore the antagonist is the _______ Biceps femoris because it causes the movement Biceps femoris because it lengthens during the contraction of the prime mover Biceps femoris because it shortens during the contraction of the prime mover Biceps femoris because it shortens during the relaxation of the prime mover
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The rectus femoris is a muscle located in the front of the thigh and is responsible for extending the leg at the knee joint. However, the antagonist muscle to the rectus femoris during knee extension is not the biceps femoris. The biceps femoris is actually a Show more…
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