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Question

Differentiate between

(a) Inspiratory and expiratory reserve volume

(b) Vital capacity and total lung capacity.

(c) Emphysema and occupational respiratory disorder.

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Solution

Difference between these are as follows

(a) Inspiratory Reserve VolumeExpiratory Reserve Volume It is the additional volume of air, a It is the additional volume of air a person can person can inspire by a forcible expire by a forcible expiration. It ranges inspiration. It ranges between 2500 mL between 1000 mL to 1100 mL. to 3000 mL.(b) Vutal CapacityTotal Lung Capacity Vital capacity is the maximum volume ofTotal using capacity is the total volume of air air that a person can breathe in after aaccommodated in the lungs at the end of a forced expiration. This includes ERV, TVforced inspiration. This includes RV, ERV, TV and IRV or the maximum volume of air aand IRV or vital capacity + residual volume. person can breathe out after a forcedi.e.,TLC=RV+(ERV+IRV+TV) or VC+RV inspiration. i.e.,Vc=ERV+IRV+TV(c) EmphysemaOccupational Respiratory Disorder Emphysema is a chronic disorder ofIt is caused due to the long exposure of dust respiratory system, in which alveolarproduced by stone grinding or breaking and cells are damaged due to whichgive rise to inflammation leading to fibrosis regulatory respiratory surface isand thus causing serious lung damage. decreased.protective masks are provided for the Cause of emphysema is cigaretteworker in such industries. smoking.


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