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Topic Question Set

Q 1 :    

Select the sequence of steps in respiration.

(A) Diffusion of gases (O2 and CO2) across alveolar membrane.
(B) Diffusion of O2 and CO2 between blood and tissues.
(C) Transport of gases by the blood.
(D) Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
(E) Utilisation of O2 by the cells for catabolic reactions are resultant release of CO2.

Choose the correct answer from the options given below:                                             [2023]

  • (D), (A), (C), (B), (E)

     

  • (C), (B), (A), (E), (D)

     

  • (B), (C), (E), (D), (A)

     

  • (A), (C), (B), (E), (D)

     

(1)

Respiration involves the following steps:
(i) Breathing or pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out.
(ii) Diffusion of gases (O2 and CO2) across alveolar membrane.
(iii) Transport of gases by the blood.
(iv) Diffusion of O2 and CO2 between blood and tissues.
(v) Utilisation of O2 by the cells for catabolic reactions and resultant release of CO2 i.e., cellular respiration.

 

Q 2 :    

Which of the following is not the function of conducting part of respiratory system?            [2022]

  • It clears inhaled air from foreign particles

     

  • Inhaled air is humidified

     

  • Temperature of inhaled air is brought to body temperature

     

  • Provides surface for diffusion of O2 and CO2

     

(4)

Exchange or respiratory part of respiratory system is the site of actual diffusion of O2 and CO2 between blood and atmospheric air.