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Working in antagonistic pairs allows the body part to move back to its original position. For instance, your fingers wouldn't work very well if you only had a muscle to flex them, but not extend them.

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13y ago
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12y ago

basically in order to re-arrange the equation of ATP+ADP=Oxygen

you must do the maths of 234234x456=756754623

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14y ago

Because muscles can only contract - shorten. So to be able to both bend and straighten a limb there has to be two muscles.

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11y ago

Because muscles are capable of shortening themselves, not lengthening. An antagonistic muscle that performs the opposite action is necessary to lengthen the paired contracted muscle.

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Q: Why must muscles be in antagonistic pairs?
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