<prompt> Maximum voluntary ventilation is -25 Lmin50 Lmin100 Lmin150 Lmin  <response>: Ans. is d i.e., 150 Lmin Pulmonary VentilationRespiratory Minute Volume RMV RMV TV x RR6000ml 6L 500 x 12The amount of air breathed in and out of lungs every minute. It is product of tidal volume TV and respiratory rate RR. RMVTVXRRMaximal Voluntary Ventilation MW Maximal breathing capacity125-170 L-minThe maximum amount of air which can be breathed in and out of lungs by forceful respiration in one minute.Alveolar ventilation TV - Dead space volume x RR4.2 litersThe amount of air utilized for gaseous exchange every minute.Total dead spacephysiological dead space Anatomical dead space Alveolar dead space In normal adult Physiological dead space Anatomical dead spaceo Anatomical dead space - The conducting part where gaseous exchange does not take place. It is volume of respirator. tract from nose up to terminal bronchiole. It is 150mLo Alveolar dead space -Those alveoli which are non functioning and those which do not receive adequate blood flow.Closing volumeThe lung volume, at which, no further air can be expelled by expiratory effort. 