Gases Exchange MCQs : This section focuses on the "Gases Exchange". These Multiple Choice Questions (MCQs) should be practiced to improve the Gases Exchange skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Carbon dioxide is _______ times more soluble than oxygen.
A. 20-25
B. 5-10
C. 15-20
D. 25-30
Question 2
Gaseous exchange is held by ________
A. osmosis
B. simple diffusion
C. facilitated diffusion
D. co-transport
Question 3
Partial pressure of oxygen in alveolar air is ________
A. 159 mm Hg
B. 90 mm Hg
C. 104 mm Hg
D. 45 mm Hg
Question 4
Right comparison of partial pressure of oxygen and partial pressure of carbon dioxide in the atmospheric air than in alveolar air is _________
A. partial pressure of oxygen lesser, partial pressure of carbon dioxide higher
B. partial pressure of oxygen higher, partial pressure of carbon dioxide lesser
C. partial pressure of oxygen lesser, partial pressure of carbon dioxide higher
D. partial pressure of oxygen lesser, partial pressure of carbon dioxide lesser
Question 5
Solubility of carbon dioxide is ________ than oxygen.
A. more
B. less
C. 50 times more
D. equal
Question 6
On which of the following factors diffusion does not depend?
A. Solubility of gases
B. Thickness of the respiratory membrane
C. Partial pressure difference
D. Molecular weight of gases
Question 7
What is the concentration of oxygen in expired air?
A. 19%
B. 4%
C. 10%
D. 16%
Question 8
What is the primary site for exchange of gases in lungs?
A. Larynx
B. Trachea
C. Alveoli
D. Bronchi
Question 9
What is the partial pressure of carbon dioxide in alveolar air and in deoxygenated blood respectively?
A. 50 mm Hg, 45 mm Hg
B. 104 mm Hg, 45 mm Hg
C. 45 mm Hg, 40 mm Hg
D. 40 mm Hg, 45 mm Hg
Question 10
Which one of the following does not consist diffusion membrane?
A. Thin squamous epithelium of alveoli
B. Cuboidal epithelium of alveoli
C. Basement membrane
D. Endothelium of blood capillaries
Question 11
____________ ml of oxygen is transported per deciliter of blood.
A. 20ml
B. 40ml
C. 10ml
D. 50ml
Question 12
Maximum amount of oxygen is exchanged from blood in ___________
A. Arteries of the body
B. Capillaries surrounding the alveoli
C. Left auricle of the heart
D. Arteries of the body
Question 13
One molecule of hemoglobin carries ___________ molecules of oxygen.
A. 4
B. 3
C. 2
D. 1
Question 14
Oxygen dissociation curve is _________
A. Parabolic
B. Hyperbolic
C. Sigmoid
D. Straight
Question 15
Oxygen is mainly transported as ____________
A. Oxyhemoglobin
B. Hemo-oxyglobin
C. Hemoglobin
D. Oxynoglobin
Question 16
Residual volume is _______________
A. Lesser than tidal volume
B. Greater than vital capacity
C. Greater than inspiratory volume
D. Greater than tidal volume
Question 17
RQ is one in case of ____________
A. Fatty acids
B. Nucleic acids
C. Organic acids
D. Carbohydrates
Question 18
Which is true for carbon dioxide concentration?
A. More in alveolar air than in expired air
B. More in inspired air than in alveolar air
C. More in expired air than in alveolar air
D. More in alveolar air than in inspired air