Physiology MCQs

Page No. 35

Carotid body function in an organ work as_______________?


aDifferential pressure of oxygen in arterial blood

✓


bDifferential pressure of oxygen in venous blood

✖


cDifferential pressure of oxygen in in tissue fluids

✖


dDifferential pressure of oxygen in in hemoglobin synthesis

✖



The approximate amount of air left in the lungs after maximal forced expiration in a normal woman______________?


a0.5 L

✖


b2.0 L

✖


c1.1 L

✓


d1.8 L

✖


View Answer 1.1 L

Inability of exchange of oxygen through lung tissue if known as____________?


aAnoxic anoxia

✖


bAnoxia

✖


cHistotoxic hypoxia

✓


dIschemic hypoxia

✖


View Answer Histotoxic hypoxia

What is true about pneumothorax ?


aTotal chest wall diameter is increased

✓


bInterpleural pressure becomes more negative

✖


cThe concentration of surfactant is reduced in alveoli

✖


dIncreased lung compliance

✖



An important non- respiratory function of lungs is_____________?


aAnion balance

✖


bSodium balance

✓


cPotassium balance

✖


dCa+2 balance

✖


View Answer Sodium balance

Carbon monoxide poisoning causes_______________?


aHypoxic hypoxia

✖


bOxygen dissociation curve shifts to left

✓


cCyanosis

✖


dDiffusion capacity of lungs decreases

✖



In cases of hypercapnia there is_______________?


aIncreased pH of blood

✖


bDecreased pH of blood

✓


cRemains same

✖


dIncreased oxygen concentration in blood

✖


View Answer Decreased pH of blood

Normal intrapleural pressure during the start of inspiration is _________ mm of Hg?


a-2

✓


b-5

✖


c0

✖


d-7

✖


View Answer -2

Energy expenditure during normal breathing____________?


a25% – 50% of total energy spent

✖


b50% -75% of total energy spent

✖


c15% – 20% of total energy spent

✖


d2% – 3% of total energy spent

✓



Kussmamul’s respiration occurs in response to_______________?


aDecrease in pH of blood

✓


bIncrease in pH of blood

✖


cObstructive pulmonary disease

✖


dCarbon monoxide poisoning

✖



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