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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