<prompt> CO2 increases ventilation by acting mainly on receptors of-Apneustic centrePneumotaxic centreVentral surface of medullaDPG  <response>: Ans. c Ventral surface of medullaRef: Ganong, 25th edp.657The locations where central chemoreceptors are present are,Ventral surface of medullaNucleus of tractus solitariusLocus ceruleusHypothalamus 