Final answer:
Reciprocal inhibition does not inhibit muscle spindles in the antagonist muscles during passive lengthening; rather, it inhibits antagonistic muscles to aid in coordinated movement.
Step-by-step explanation:
The statement in question is about reciprocal inhibition, which refers to the process during a reflex action where the muscles on one side of a joint relax to accommodate the contraction on the other side. The phenomenon described in the question, however, does not accurately describe reciprocal inhibition.
Instead, reciprocal inhibition is specifically the inhibition of antagonist muscles during an active motion of the agonists, such as the inhibition of the triceps when the biceps contract. The inhibition of muscle spindles occurring in antagonist muscles during passive lengthening is not what reciprocal inhibition refers to. Instead, reciprocal inhibition aids in coordinated movement by preventing the antagonistic muscles from resisting the motion.