Physiology MCQs

Page No. 34

Increase in partial pressure of CO2 leading to release of oxygen to the tissues is________________?


aHaldane effect


bBohr effect


cBreur effect


dHamburger effect


View Answer Bohr effect

Which of the following statements about pulmonary surfactant is false ?


aIt is secreted by Type II pneumocytes


bIt contains lecithin and sphingomyelin


cIt increases surface tension


dIt prevents collapse of smaller alveoli



At high altitudes the following changes takes place except_______________?


aIncrease in respiratory rate


bIncreases in depth of respiration


cIncrease in oxygen carrying capacity of blood


dIncrease in partial pressure of CO2



Shift of the oxygen dissociation curve to right is caused by the following factors EXCEPT_______________?


aIncreased 2,3 BPG


bIncreased temperature


cIncreased concentration of carbon – di – oxide


dIncreased concentration of oxygen



The work of breathing__________________?


ais inversely related to lung compliance


bremains constant during exercise


cis not affected by respiratory


ddecreased in lying posture



Bronchial circulation is associated with__________________?


aAir conditioning


bDrug absorption


cGaseous exchange


dReserve volume


View Answer Gaseous exchange

Which of the following adaptations will be apt to increase the work capacity at high altitude_________________?


aIncreased workload, decreasing duration of exercise


bIncreased workload, increasing duration of exercise


cDecreasing workload, increasing duration of exercise


dDecreasing workload, decreasing duration of exercise



The quantity of water lost in expired air each 24 hrs is about___________?


a200 ML


b400 ML


c600 ML


d800 ML


View Answer 400 ML

Oxygen as an emergency drug is contraindicated in______________?


aAnaphylaxis


bAsthma


cHyperventilation


dCOPD


View Answer Hyperventilation

The transport of CO is diffusion limited because_______________?


aBind avidly with Hb


bPartial pressure of CO is less


cCO is less absorbed in water


dAlveolar membrane is less permeable


View Answer Bind avidly with Hb

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