The maintenance of posture in a normal adult human being depends upon:: (A) Integrity of reflex arc, (B) Muscle power, (C) Type of muscle fibers, (D) Joint movements in physiological range
Answer is A. A i.e. Integrity of Reflex arc'Postural Reflexes not only maintain the body in an upright balanced position but also provide the constant adjustments necessary to maintain a stable postural background for voluntary activity'- Ganong 22"V207Integrity of the postural reflex arc is therefore the single best answer of choice.