1) Which instrument is used for measuring volume of air involved in breathing? a) Aerometer b) Spirometer c) Galvanometer d) Electrocardiogram 2) At the time of inspiration, _________ takes place. a) relaxation in external intercostal muscle b) relaxation in diaphragm c) contraction in diaphragm d) no effect on diaphragm 3) Inspiration occurs when there is ___________ a) no pressure gradient b) negative pressure in the lungs c) positive pressure in the lungs d) more pressure in lungs than atmosphere 4) The amount of air inspired or expired during normal breathing is_________ ml. a) 500 b) 500-1000 c) 1000-1100 d) 2100 5) Vital capacity = _______ a) ERV + RV b) IRV + TV c) IRV + TV + ERV + RV d) IRV + ERV + TV

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