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.Management Sciences
Category: Respiratory System
Which of the following statements about pulmonary surfactant is false ?
A. It is secreted by Type II pneumocytes
B. It contains lecithin and sphingomyelin
C. It increases surface tension
D. It prevents collapse of smaller alveoli
Arterial O2 content is reduced in one of following ______________?
A. Stagnant hypoxia
B. Anemic hypoxia
C. Histotoxic hypoxia
D. Hypoxic or arterial hypoxia
The quantity of water lost in expired air each 24 hrs is about___________?
A. 200 ML
B. 400 ML
C. 600 ML
D. 800 ML
Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?
A. The relative proportion of reduced and oxygenated hemoglobin
B. The absolute amount of reduced hemoglobin
C. Thickness of the skin
D. Fragility of capillaries
During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?
A. More negative
B. Less negative
C. Positive
D. Equal to the intra alveolar pressure
Hypoxia is characterized by ___________?
A. Low arterial PO2
B. Intense chemoreceptor response
C. Favorable response to 100% oxygen
D. All of the above
The intrapleural pressure at the end of deep inspiration is ______________?
A. -4 mm Hg
B. +4 mm Hg
C. -18 mm Hg
D. + mm Hg
Oxygen dissociation cure is shifted to the right in all except_____________?
A. Fall in pH
B. Rise in temperature
C. Increase of 2, 3 3 DPG
D. HbF
The work of breathing__________________?
A. is inversely related to lung compliance
B. remains constant during exercise
C. is not affected by respiratory
D. decreased in lying posture
Increase in partial pressure of CO2 leading to release of oxygen to the tissues is________________?
A. Haldane effect
B. Bohr effect
C. Breur effect
D. Hamburger effect
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