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Gaseous Exchange in Plants

Body tissues ...

Question

Body tissues obtain O $_{2}$ from oxyhaemoglobin because of its dissociation caused by

Low O

_{2}

concentration

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Low CO

_{2}

concentration

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Low O

_{2}

and high CO

_{2}

concentration

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High CO

_{2}

concentration

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Solution

The correct option is C Low O $_{2}$ and high CO $_{2}$ concentration
At high oxygen concentrations oxyhaemoglobin is formed and at low oxygen concentrations oxyhaemoglobin dissociates to haemoglobin and oxygen. The presence of carbon dioxide helps the release of oxygen from haemoglobin, this is known as the Bohr effect. Carbon dioxide is a waste product of respiration and its concentration is high in the respiring cell. So, in the metabolically active cells increased carbon dioxide causes release of oxygen from oxyhemoglobin.

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O_{2}

Respiration in insects is called direct because

(a) the cells exchange $O_{2} / C O_{2}$ directly with the air in the tubes

(b) the tissues exchange $O_{2} / C O_{2}$ directly with the air in the tubes

(d) tracheal tubes exchange $O_{2} / C O_{2}$ directly with the haemocoel which then exchange with tissues

{cos}^{2} 1^{o} + {cos}^{2} 2^{o} + {cos}^{2} 3^{o} . . . . . . . . . . . . + {cos}^{2} 90^{o}

O_{2}

{C O}_{2}

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O_{2}

0.08 g

{C O}_{2}

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37^{0} C

10 l i t r e s

[R = 0.0821 L a t m {v o l}^{- 1} K^{- 1}]

{cos}^{2} 20^{o} + {cos}^{2} 30^{o} + {cos}^{2} 40^{o} + {cos}^{2} 50^{o} + {cos}^{2} 70^{o}

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