MCAT Question A Day - 9/2/14 - Answer!
When one of a pair of antagonistic muscles contracts, what usually happens to the other muscle to produce movement?
A. It acts synergistically by contracting to stabilize the moving bone.
B. It relaxes to allow movement.
C. It contracts in an isometric action.
D. Its insertion slides down the bone to allow a larger range of movement.
B is correct. Antagonistic muscles move bones in opposite directions relative to a joint. In order to produce movement, one must relax while the other contracts.
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B is correct. Antagonistic muscles move bones in opposite directions relative to a joint. In order to produce movement, one must relax while the other contracts.
Want more questions? - Click here to check out our MCAT Question A Day archive
