Suppose arterial pCO2 levels increase (as might occur during breath holding).  How is respiratory rate and depth changed to compensate for an increase in arterial pCO2 – trace each specific part(s) of the reflex arc involved for peripheral chemoreceptors.  Note: a reflex arc consists of a receptor, afferent (sensory) pathway, integration center, efferent (motor) pathway, and effector(s).  Discuss the role of central chemoreceptors in control of breathing citing the key differences between the peripheral and central chemoreceptors. The post human anatomy and physiology, biology homework help first appeared on Nursing School Essays.