Medical MCQs – Respiratory System ( Physiology ) MCQs
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Latest Medical MCQs
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Latest Respiratory System ( Physiology ) Mcqs
The most occurred mcqs of Respiratory System ( Physiology ) in past papers. Past papers of Respiratory System ( Physiology ) Mcqs. Past papers of Respiratory System ( Physiology ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Respiratory System ( Physiology ) Mcqs. The Important series of Respiratory System ( Physiology ) Mcqs are given below:
The oxygen tension of the mixed venous blood is______________?
A. 55 mm Hg
B. 40 mm Hg
C. 25 mm Hg
D. 70 mm Hg
In Haldane effect CO2 dissociation curve is shifted to_____________?
A. Does not shift
B. Right
C. Left
D. None of the above
The most common form of hypoxia is______________?
A. Hypoxic
B. Anemic
C. Stagnant
D. Histotoxic
Which of the following does not stimulate alveolar hyperventilation ?
A. Hypercapnia
B. Hypoxia
C. Acidosis
D. Stretching of airways
Arterial PO2 is reduced in_____________?
A. KCN poisoning
B. Anemia
C. Pulmonary hypoventilation
D. CO poisoning
In which of the following diseases would you expect to find an increase in thickness of the respiratory membrane ?
A. Emphysema
B. Pulmonary artery thrombosis
C. Asthma
D. Skeletal abnormalities of the chest
Muscle of expiration____________?
A. External intercostals
B. Internal intercostals
C. Diaphragm
D. Rcti Abdominis
Oxygen dissociation cure is shifted to the right in all except_____________?
A. Rise in temperature
B. Fall in pH
C. Increase of 2, 3 3 DPG
D. HbF
The alveolar ventilation in an individual with tidal volume: 600 ml, dead space 150 ml and respiratory rate of 15/ minute is_____________?
A. 4.0 lit /Min
B. 2.5 lit/Min
C. 6.75 Lit/Min
D. 9 Lit/Min
The intrapleural pressure at the end of deep inspiration is ______________?
A. -4 mm Hg
B. -18 mm Hg
C. +4 mm Hg
D. + mm Hg
Hypoxia is characterized by ___________?
A. Intense chemoreceptor response
B. Low arterial PO2
C. Favorable response to 100% oxygen
D. All of the above
Gut And Liver MCQs
Alveolar O2 tension is______________?
A. Increased by hyperventilation
B. Similar to venous O2 tension
C. Decreased by hyperventilation
D. Not affected by respiratory depression
Surfactant is secreted by_____________?
A. Goblet cells
B. Pnemocyte II
C. Pnemocyte I
D. Pulmonary vessels
Vital capacity is decreased, timed vital capacity (FEV 1.0 %) is normal in______________?
A. Chronic bronchitis
B. Scoliosis
C. Bronchial asthma
D. Acute bronchitis
The type of hypoxia present in high attitude is_____________?
A. Stagnant Hypoxia
B. Hypoxic Hypoxia
C. Anemic Hypoxia
D. Histotoxic Hypoxia
The volume of gas in the lungs at the end of normal expiration is____________?
A. Residual volume
B. Functional residual capacity
C. Expiratory reserve volume
D. Inspiratory reserve volume
tidal volume in adult is_____________?
A. 1500 ml
B. 500 ml
C. 125 ml
D. 2200 ml
A decrease in the arterial PO2 is seen in______________?
A. Decrease in hemoglobin concentration of arterial blood
B. Sluggish blood flow
C. Paralysis of inspiratory muscles
D. High altitudes
Kussmamul’s respiration occurs in response to_______________?
A. Decrease in pH of blood
B. Obstructive pulmonary disease
C. Increase in pH of blood
D. Carbon monoxide poisoning
Energy expenditure during normal breathing____________?
A. 50% -75% of total energy spent
B. 25% – 50% of total energy spent
C. 15% – 20% of total energy spent
D. 2% – 3% of total energy spent
Normal intrapleural pressure during the start of inspiration is _________ mm of Hg?
A. -2
B. 0
C. -5
D. -7
In cases of hypercapnia there is_______________?
A. Remains same
B. Decreased pH of blood
C. Increased pH of blood
D. Increased oxygen concentration in blood
Carbon monoxide poisoning causes_______________?
A. Cyanosis
B. Oxygen dissociation curve shifts to left
C. Hypoxic hypoxia
D. Diffusion capacity of lungs decreases
An important non- respiratory function of lungs is_____________?
A. Potassium balance
B. Sodium balance
C. Anion balance
D. Ca+2 balance
What is true about pneumothorax ?
A. Total chest wall diameter is increased
B. Increased lung compliance
C. The concentration of surfactant is reduced in alveoli
D. Interpleural pressure becomes more negative
Inability of exchange of oxygen through lung tissue if known as____________?
A. Anoxia
B. Anoxic anoxia
C. Histotoxic hypoxia
D. Ischemic hypoxia
Central Nervous System MCQs
The approximate amount of air left in the lungs after maximal forced expiration in a normal woman______________?
A. 2.0 L
B. 0.5 L
C. 1.1 L
D. 1.8 L
Carotid body function in an organ work as_______________?
A. Differential pressure of oxygen in arterial blood
B. Differential pressure of oxygen in tissue fluids
C. Differential pressure of oxygen in venous blood
D. Differential pressure of oxygen in in hemoglobin synthesis
The transport of CO is diffusion limited because_______________?
A. Bind avidly with Hb
B. CO is less absorbed in water
C. Partial pressure of CO is less
D. Alveolar membrane is less permeable
Oxygen as an emergency drug is contraindicated in______________?
A. Asthma
B. Anaphylaxis
C. Hyperventilation
D. COPD
The quantity of water lost in expired air each 24 hrs is about___________?
A. 600 ML
B. 400 ML
C. 200 ML
D. 800 ML
Which of the following adaptations will be apt to increase the work capacity at high altitude_________________?
A. Increased workload, increasing duration of exercise
B. Increased workload, decreasing duration of exercise
C. Decreasing workload, increasing duration of exercise
D. Decreasing workload, decreasing duration of exercise
Bronchial circulation is associated with__________________?
A. Drug absorption
B. Air conditioning
C. Gaseous exchange
D. Reserve volume
The work of breathing__________________?
A. is inversely related to lung compliance
B. is not affected by respiratory
C. remains constant during exercise
D. decreased in lying posture
Shift of the oxygen dissociation curve to right is caused by the following factors EXCEPT_______________?
A. Increased temperature
B. Increased 2,3 BPG
C. Increased concentration of carbon – di – oxide
D. Increased concentration of oxygen
At high altitudes the following changes takes place except_______________?
A. Increases in depth of respiration
B. Increase in respiratory rate
C. Increase in oxygen carrying capacity of blood
D. Increase in partial pressure of CO2
Which of the following statements about pulmonary surfactant is false ?
A. It contains lecithin and sphingomyelin
B. It is secreted by Type II pneumocytes
C. It increases surface tension
D. It prevents collapse of smaller alveoli
Increase in partial pressure of CO2 leading to release of oxygen to the tissues is________________?
A. Breur effect
B. Bohr effect
C. Haldane effect
D. Hamburger effect
Ventilation perfusion ratio is maximum in_______________?
A. Posterior lobe of lung
B. Apex of lung
C. Base of lung
D. Middle lobe of lung
Vital capacity is a measure of________________?
A. Inspiratory reserve volume plus expiratory volume
B. Tidal volume
C. Tidal volume plus inspiratory reserve volume plus expiratory reserve volume
D. Expiratory reserve volume plus reserve volume
Oxygen affinity decreases in_________________?
A. Hypoxia
B. HbF
C. Hypothermia
D. Increased pH
Endocrinology MCQs
Arterial O2 content is reduced in one of following ______________?
A. Histotoxic hypoxia
B. Anemic hypoxia
C. Stagnant hypoxia
D. Hypoxic or arterial hypoxia
Oxygen affinity is increased by all except_________________?
A. Increased HbF
B. Hypoxia
C. Alkalosis
D. Hypothermia
Non- respiratory function of the lung is_________________?
A. Adrenaline metabolism
B. Dopamine metabolism
C. Serotonin metabolism
D. PGE2 production
Smoking causes_____________?
A. Cellular hyperplasia
B. Ciliary motility
C. Mucous secretion
D. All of the above
Limitation of inspiration by vagal lung inflation signals is called the______________?
A. Bainbridge reflex
B. Autonomic reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex
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. Fragility of capillaries
D. Thickness of the skin
During the initial part of inspiration, which of the following does not occur ?
A. Intra-abdominal pressure rises
B. Intra thoracic pressure rises
C. Intrapulmonary pressure falls
D. The partial pressure of O2 in dead space rises
What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ?
A. P50 increase and the oxygen affinity decreases
B. P 50 and oxygen affinity increase
C. P 50 decreases and the oxygen affinity increases
D. P50 and oxygen affinity decrease
The best stimulator of respiratory center is____________?
A. Increase in arterial oxygen level
B. Increase in arterial carbon dioxide level
C. Decrease in arterial carbon dioxide level
D. None of the above
Oxygen dissociation curve shifts to the right by all of the following except_____________?
A. Rise in carbon dioxide tension
B. Rise in temperature
C. Rise in pH
D. Rise in H+ ion
Most effective method of assessing breathing is by measuring____________?
A. Respiratory rate
B. Tidal volume
C. Alveolar ventilation
D. FEV 1
The major sign of hypoventilations_____________?
A. Dyspnea
B. Cyanosis
C. Hypercapnia
D. Hypoxia
During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?
A. More negative
B. Positive
C. Less negative
D. Equal to the intra alveolar pressure