191. Non- respiratory function of the lung is_________________?

A. Dopamine metabolism
B. Adrenaline metabolism
C. Serotonin metabolism
D. PGE2 production

192. Smoking causes_____________?

A. Ciliary motility
B. Cellular hyperplasia
C. Mucous secretion
D. All of the above

193. Limitation of inspiration by vagal lung inflation signals is called the______________?

A. Autonomic reflex
B. Bainbridge reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex

194. 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

195. During the initial part of inspiration, which of the following does not occur ?

A. Intrapulmonary pressure falls
B. Intra thoracic pressure rises
C. Intra-abdominal pressure rises
D. The partial pressure of O2 in dead space rises

196. Ventilation perfusion ratio is maximum in_______________?

A. Base of lung
B. Apex of lung
C. Posterior lobe of lung
D. Middle lobe of lung

197. Vital capacity is a measure of________________?

A. Tidal volume
B. Inspiratory reserve volume plus expiratory volume
C. Tidal volume plus inspiratory reserve volume plus expiratory reserve volume
D. Expiratory reserve volume plus reserve volume

198. Oxygen affinity decreases in_________________?

A. Hypoxia
B. Hypothermia
C. HbF
D. Increased pH

199. Arterial O2 content is reduced in one of following ______________?

A. Stagnant hypoxia
B. Anemic hypoxia
C. Histotoxic hypoxia
D. Hypoxic or arterial hypoxia

200. Oxygen affinity is increased by all except_________________?

A. Alkalosis
B. Hypoxia
C. Increased HbF
D. Hypothermia