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Home >> Physiology >> Respiratory Physiology >> Mcqs Page 1

(Single Best Answer) Question 1: In hypoxia ?

A) Pulmonary vessels constrict
B) Pulmonary vessels dilate
Answer (Select an option above to get the answer):

(Single Best Answer) Question 2: True about bradykinin ?

A) Causes pain sensation
B) Bronchodilation
C) Vasoconstriction
D) Decreased capillary permeability
Answer (Select an option above to get the answer):

(Single Best Answer) Question 3: Surfactant action ?

A) Breaks structure of water
B) Lubricates CO2 diffusion
C) Makes capillary surface hydrophilic
D) Binds oxygen
Answer (Select an option above to get the answer):

(Single Best Answer) Question 4: Total lung capacity is directly related to ?

A) Closing volume
B) Lung compliance
C) Size of airway
D) Residual volume
Answer (Select an option above to get the answer):

(Single Best Answer) Question 5: Pulmonary surfactant is secreted by ?

A) Type I pneumocytes
B) Type II pneumocytes
C) Clara cells
D) Bronchial epithelial cells
Answer (Select an option above to get the answer):

(Single Best Answer) Question 6: "Inflation of lungs induces further inflation" is explained by ?

A) Hering-Breuer inflation reflex
B) Hering-Breuer deflation reflex
C) Head's paradoxical reflex
D) J-reflex
Answer (Select an option above to get the answer):

(Single Best Answer) Question 7: The intrapleural pressure is negative both during inspiration and expiration because ?

A) Intrapulmonary pressure is always negative
B) Thoracic cage and lungs are elastic structures.
C) Transpulmonary pressure determines the negativity
D) Surfactant prevents the lungs to collapse
Answer (Select an option above to get the answer):

(Single Best Answer) Question 8: Which gas is used to measure diffusion capacity ?

A) CO
B) Nitrogen
C) CO₂
D) Helium
Answer (Select an option above to get the answer):

(Single Best Answer) Question 9: Which of the following is not a stimulus for normal respiration ?

A) Stretch receptor
B) J receptor
C) pO2
D) pCO2
Answer (Select an option above to get the answer):

(Single Best Answer) Question 10: Hypoxia is independent of ?

A) FiO2
B) Altitude
C) Hb
D) pCO2
Answer (Select an option above to get the answer):