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Physiology

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Respiration

Question
14 out of 15
 

Total lung capacity is



A 3 — 4 litres
B 4 — 5 litres

C 6 — 7 litres
D 7 — 8 litres

Ans. C 6 — 7 litres

Important parameters of lungs:-

I. Vital capacity = IRV + TV + ERV Q = Inspiratory capacity + ERV Q

II. Inspiratory capacity = IRV + TV Q

III. Functional residual capacity = ERV + RV Q

IV. Respirator minute volume or Pulmonary ventilation = 6 L/min Q

V. Alveolar ventilation (at rest) = 4.2 L/minQ

VI. Maximal voluntary ventilation (BTPS) 125 — 170 L/min Q

VII. Timed vital capacity: - 80% of total in 1 second; 97% in 3 seconds Q

VIII. Work of quite breathing: - 0.5 kg-m/min. Q

IX. Maximal work of breathing: - 10kg-m/breath Q

X. TV = 150mL (dead space) + 350 (Alveolar volume) = 500 ml. Q

Respiration Flashcard List

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