For antagonistic muscle groups to move a limb, flexor contraction occurs coincident with

For antagonistic muscle groups to move a limb, flexor contraction occurs coincident with

For antagonistic muscle groups to move a limb, flexor contraction occurs coincident with 



A) contraction of the extensor.
B) relaxation of the extensor.
C) no changes in the extensor.
D) contraction of the tendon.


Answer: : B


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