Question: Vital capacity is a measure of________________?

• 1. Tidal volume
• 2. Inspiratory reserve volume plus expiratory volume
• 3. Tidal volume plus inspiratory reserve volume plus expiratory reserve volume
• 4. Expiratory reserve volume plus reserve volume

Question: Oxygen affinity decreases in_________________?

• 1. Hypoxia
• 2. Hypothermia
• 3. HbF
• 4. Increased pH

Question: Arterial O2 content is reduced in one of following ______________?

• 1. Stagnant hypoxia
• 2. Anemic hypoxia
• 3. Histotoxic hypoxia
• 4. Hypoxic or arterial hypoxia

Question: Oxygen affinity is increased by all except_________________?

• 1. Alkalosis
• 2. Hypoxia
• 3. Increased HbF
• 4. Hypothermia

Question: Non- respiratory function of the lung is_________________?

• 1. Dopamine metabolism
• 2. Adrenaline metabolism
• 3. Serotonin metabolism
• 4. PGE2 production

Question: Smoking causes_____________?

• 1. Ciliary motility
• 2. Cellular hyperplasia
• 3. Mucous secretion
• 4. All of the above

Question: Limitation of inspiration by vagal lung inflation signals is called the______________?

• 1. Autonomic reflex
• 2. Bainbridge reflex
• 3. Herring – Breur reflex
• 4. Dynamic stretch reflex

Question: Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?

• 1. The relative proportion of reduced and oxygenated hemoglobin
• 2. The absolute amount of reduced hemoglobin
• 3. Thickness of the skin
• 4. Fragility of capillaries

Question: During the initial part of inspiration, which of the following does not occur ?

• 1. Intrapulmonary pressure falls
• 2. Intra thoracic pressure rises
• 3. Intra-abdominal pressure rises
• 4. The partial pressure of O2 in dead space rises

Question: What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ?

• 1. P50 and oxygen affinity decrease
• 2. P 50 and oxygen affinity increase
• 3. P 50 decreases and the oxygen affinity increases
• 4. P50 increase and the oxygen affinity decreases