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Structures not supported by incomplete cartilaginous rings are/is

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Important Questions on Breathing and Exchange of Gases

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Animals which have a network of tracheal tubes to transport atmospheric air within the body are
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In humans, the thoracic chamber is formed dorsally by the ___A__ and ventrally by the ___B__ . Choose the option which fills the blanks correctly.
MEDIUM
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The total volume of air present in the lungs after maximum inspiration is
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With increase in body temperature due to enhanced metabolic activities in human body
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Partial pressure (in mm Hg) of O2 and CO2 in alveoli are respectively
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Match Column I with Column II w.r.t. respiratory volumes and their values.

Column I Column II
a. Tidal volume (i) 1100-1200 mL
b. Inspiratory Reserve volume  (ii) 1000-1100 mL
c. Expiratory Reserve volume (iii) 2500-3000 mL
d. Residual volume (iv) 500 mL

Choose the correct option.

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Factor which is not favourable for the dissociation of HbO2 in the body tissues is
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Respiratory rhythm centre and pneumotaxic centre are respectively located in