Respiratory System MCQs

Option A: 25 mm Hg

Option B: 40 mm Hg

Option C: 55 mm Hg

Option D: 70 mm Hg

Correct Answer: 40 mm Hg ✔

Option A: Left

Option B: Right

Option C: Does not shift

Option D: None of the above

Correct Answer: Right ✔

Option A: Hypoxic

Option B: Stagnant

Option C: Anemic

Option D: Histotoxic

Correct Answer: Hypoxic ✔

Option A: Hypoxia

Option B: Hypercapnia

Option C: Acidosis

Option D: Stretching of airways

Correct Answer: Stretching of airways ✔

Option A: Anemia

Option B: KCN poisoning

Option C: Pulmonary hypoventilation

Option D: CO poisoning

Correct Answer: Pulmonary hypoventilation ✔

Option A: Emphysema

Option B: Asthma

Option C: Pulmonary artery thrombosis

Option D: Skeletal abnormalities of the chest

Correct Answer: Emphysema ✔

Option A: Diaphragm

Option B: Internal intercostals

Option C: External intercostals

Option D: Rcti Abdominis

Correct Answer: Internal intercostals ✔

Option A: Fall in pH

Option B: Rise in temperature

Option C: Increase of 2, 3 3 DPG

Option D: HbF

Correct Answer: HbF ✔

Option A: 2.5 lit/Min

Option B: 4.0 lit /Min

Option C: 6.75 Lit/Min

Option D: 9 Lit/Min

Correct Answer: 6.75 Lit/Min ✔

Option A: -4 mm Hg

Option B: +4 mm Hg

Option C: -18 mm Hg

Option D: + mm Hg

Correct Answer: -4 mm Hg ✔

Option A: Low arterial PO2

Option B: Intense chemoreceptor response

Option C: Favorable response to 100% oxygen

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Increased by hyperventilation

Option B: Decreased by hyperventilation

Option C: Similar to venous O2 tension

Option D: Not affected by respiratory depression

Correct Answer: Increased by hyperventilation ✔

Option A: Pnemocyte I

Option B: Pnemocyte II

Option C: Goblet cells

Option D: Pulmonary vessels

Correct Answer: Pnemocyte I ✔

Option A: Bronchial asthma

Option B: Scoliosis

Option C: Chronic bronchitis

Option D: Acute bronchitis

Correct Answer: Scoliosis ✔

Option A: Anemic Hypoxia

Option B: Hypoxic Hypoxia

Option C: Stagnant Hypoxia

Option D: Histotoxic Hypoxia

Correct Answer: Hypoxic Hypoxia ✔

Option A: Expiratory reserve volume

Option B: Functional residual capacity

Option C: Residual volume

Option D: Inspiratory reserve volume

Correct Answer: Functional residual capacity ✔

Option A: 125 ml

Option B: 500 ml

Option C: 1500 ml

Option D: 2200 ml

Correct Answer: 500 ml ✔

Option A: Decrease in hemoglobin concentration of arterial blood

Option B: Paralysis of inspiratory muscles

Option C: Sluggish blood flow

Option D: High altitudes

Correct Answer: High altitudes ✔

Option A: Decrease in pH of blood

Option B: Increase in pH of blood

Option C: Obstructive pulmonary disease

Option D: Carbon monoxide poisoning

Correct Answer: Decrease in pH of blood ✔

Option A: 25% – 50% of total energy spent

Option B: 50% -75% of total energy spent

Option C: 15% – 20% of total energy spent

Option D: 2% – 3% of total energy spent

Correct Answer: D. 2% – 3% of total energy spent ✔

Option A: -2

Option B: -5

Option C: 0

Option D: -7

Correct Answer: -2 ✔

Option A: Increased pH of blood

Option B: Decreased pH of blood

Option C: Remains same

Option D: Increased oxygen concentration in blood

Correct Answer: Decreased pH of blood ✔

Option A: Hypoxic hypoxia

Option B: Oxygen dissociation curve shifts to left

Option C: Cyanosis

Option D: Diffusion capacity of lungs decreases

Correct Answer: Oxygen dissociation curve shifts to left ✔

Option A: Anion balance

Option B: Sodium balance

Option C: Potassium balance

Option D: Ca+2 balance

Correct Answer: Sodium balance ✔

Option A: Total chest wall diameter is increased

Option B: Interpleural pressure becomes more negative

Option C: The concentration of surfactant is reduced in alveoli

Option D: Increased lung compliance

Correct Answer: Total chest wall diameter is increased ✔

Option A: Anoxic anoxia

Option B: Anoxia

Option C: Histotoxic hypoxia

Option D: Ischemic hypoxia

Correct Answer: Histotoxic hypoxia ✔

Option A: 0.5 L

Option B: 2.0 L

Option C: 1.1 L

Option D: 1.8 L

Correct Answer: 1.1 L ✔

Option A: Differential pressure of oxygen in arterial blood

Option B: Differential pressure of oxygen in venous blood

Option C: Differential pressure of oxygen in in tissue fluids

Option D: Differential pressure of oxygen in in hemoglobin synthesis

Correct Answer: Differential pressure of oxygen in arterial blood ✔

Option A: Bind avidly with Hb

Option B: Partial pressure of CO is less

Option C: CO is less absorbed in water

Option D: Alveolar membrane is less permeable

Correct Answer: Bind avidly with Hb ✔

Option A: Anaphylaxis

Option B: Asthma

Option C: Hyperventilation

Option D: COPD

Correct Answer: Hyperventilation ✔

Option A: 200 ML

Option B: 400 ML

Option C: 600 ML

Option D: 800 ML

Correct Answer: 400 ML ✔

Option A: Increased workload, decreasing duration of exercise

Option B: Increased workload, increasing duration of exercise

Option C: Decreasing workload, increasing duration of exercise

Option D: Decreasing workload, decreasing duration of exercise

Correct Answer: Decreasing workload, increasing duration of exercise ✔

Option A: Air conditioning

Option B: Drug absorption

Option C: Gaseous exchange

Option D: Reserve volume

Correct Answer: Gaseous exchange ✔

Option A: is inversely related to lung compliance

Option B: remains constant during exercise

Option C: is not affected by respiratory

Option D: decreased in lying posture

Correct Answer: is inversely related to lung compliance ✔

Option A: Increased 2,3 BPG

Option B: Increased temperature

Option C: Increased concentration of carbon – di – oxide

Option D: Increased concentration of oxygen

Correct Answer: Increased concentration of oxygen ✔

Option A: Increase in respiratory rate

Option B: Increases in depth of respiration

Option C: Increase in oxygen carrying capacity of blood

Option D: Increase in partial pressure of CO2

Correct Answer: Increase in partial pressure of CO2 ✔

Option A: It is secreted by Type II pneumocytes

Option B: It contains lecithin and sphingomyelin

Option C: It increases surface tension

Option D: It prevents collapse of smaller alveoli

Correct Answer: It increases surface tension ✔

Option A: Haldane effect

Option B: Bohr effect

Option C: Breur effect

Option D: Hamburger effect

Correct Answer: Bohr effect ✔

Option A: Base of lung

Option B: Apex of lung

Option C: Posterior lobe of lung

Option D: Middle lobe of lung

Correct Answer: Apex of lung ✔

Option A: Tidal volume

Option B: Inspiratory reserve volume plus expiratory volume

Option C: Tidal volume plus inspiratory reserve volume plus expiratory reserve volume

Option D: Expiratory reserve volume plus reserve volume

Correct Answer: Tidal volume ✔

Option A: Hypoxia

Option B: Hypothermia

Option C: HbF

Option D: Increased pH

Correct Answer: Hypoxia ✔

Option A: Stagnant hypoxia

Option B: Anemic hypoxia

Option C: Histotoxic hypoxia

Option D: Hypoxic or arterial hypoxia

Correct Answer: Anemic hypoxia ✔

Option A: Alkalosis

Option B: Hypoxia

Option C: Increased HbF

Option D: Hypothermia

Correct Answer: Hypoxia ✔

Option A: Dopamine metabolism

Option B: Adrenaline metabolism

Option C: Serotonin metabolism

Option D: PGE2 production

Correct Answer: Serotonin metabolism ✔

Option A: Ciliary motility

Option B: Cellular hyperplasia

Option C: Mucous secretion

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Autonomic reflex

Option B: Bainbridge reflex

Option C: Herring – Breur reflex

Option D: Dynamic stretch reflex

Correct Answer: C. Herring – Breur reflex ✔

Option A: The relative proportion of reduced and oxygenated hemoglobin

Option B: The absolute amount of reduced hemoglobin

Option C: Thickness of the skin

Option D: Fragility of capillaries

Correct Answer: The absolute amount of reduced hemoglobin ✔

Option A: Intrapulmonary pressure falls

Option B: Intra thoracic pressure rises

Option C: Intra-abdominal pressure rises

Option D: The partial pressure of O2 in dead space rises

Correct Answer: Intra thoracic pressure rises ✔

Option A: P50 and oxygen affinity decrease

Option B: P 50 and oxygen affinity increase

Option C: P 50 decreases and the oxygen affinity increases

Option D: P50 increase and the oxygen affinity decreases

Correct Answer: P 50 and oxygen affinity increase ✔

Option A: Decrease in arterial carbon dioxide level

Option B: Increase in arterial carbon dioxide level

Option C: Increase in arterial oxygen level

Option D: None of the above

Correct Answer: Increase in arterial carbon dioxide level ✔

Option A: Rise in temperature

Option B: Rise in carbon dioxide tension

Option C: Rise in pH

Option D: Rise in H+ ion

Correct Answer: Rise in pH ✔

Option A: Tidal volume

Option B: Respiratory rate

Option C: Alveolar ventilation

Option D: FEV 1

Correct Answer: FEV 1 ✔

Option A: Cyanosis

Option B: Dyspnea

Option C: Hypercapnia

Option D: Hypoxia

Correct Answer: Hypercapnia ✔

Option A: More negative

Option B: Less negative

Option C: Positive

Option D: Equal to the intra alveolar pressure

Correct Answer: More negative ✔