Breathing and Exchange of Gases MCQ. We covered all the Breathing and Exchange of Gases MCQ in this post for free so that you can practice well for the exam.
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MCQ on Breathing and Exchange of Gases for NEET Students
Which of the following does not interfere with the binding of oxygen with hemoglobin?
(A) Partial pressure of O₂ and CO₂
(B) H concentration
(C) Temperature
(D) Low concentration of carbonic anhydrase
Option d – Low concentration of carbonic anhydrase
Book lungs are the respiratory structures of
(A) Arthropods
(B) Sponges
(C) Coelenterates
(D) Earthworms
Option a – Arthropods
The lungs are located in
(A) thoracic cavity
(B) partly in the thoracic and partly in the abdominal cavity
(C) abdominal cavity
(D) none of these
Option a – thoracic cavity
Identify the organism in which respiration occurs without any specialized respiratory organ.
(A) Cockroach
(B) Fish
(C) Frog
(D) Earthworm
Option d – Earthworm
Select the INCORRECT statement from the following with respect to tidal volume.
(A) It is approximately 500 mL.
(B) It is the additional volume of air, a person can expire by a forcible expiration.
(C) It is a volume of air inspired or expired during normal respiration
(D) A healthy man can inspire or expire approximately 6000 to 8000 mL of air per minute.
Option b – It is the additional volume of air, a person can expire by a forcible expiration.
Maximum volume of air a person can breathe in after forced expiration is
(A) Vital capacity
(B) Total lung capacity
(C) Inspiratory capacity
(D) Functional residual capacity
Option a – Vital capacity
Lungs are covered by
(A) pleural membrane
(B) peritoneum
(C) pericardium
(D) mesoglea
Option a – pleural membrane
The exchange of gases in the lungs occurs by
(A) simple diffusion
(B) active transport
(C) osmosis
(D) Both (A) and (B)
Option a – simple diffusion
The enzyme carbonic anhydrase in very high concentration is found in
(A) blood platelets
(B) WBCS
(C) RBCs
(D) blood plasma
Option c – RBCs
During expiration, the diaphragm becomes
(A) oblique
(B) dome-shaped
(C) normal
(D) flattened
Option b – dome-shaped
Even after a forcible expiration, some air is left in the lungs which is
(A) residual volume
(B) vital capacity
(C) total capacity
(D) tidal volume
Option a – residual volume
Which of the following factor is NOT favorable for the formation of oxyhemoglobin?
(A) low pO₂ and high CO₂
(B) lower temperature
(C) high pO₂ and low pCO2
(D) lesser H concentration
Option a – low pO₂ and high CO₂
Identify the condition for the dissociation of oxygen from oxyhemoglobin at the tissue level.
(A) The concentration of H is low.
(B) the partial pressure of O₂ is low and the partial pressure of CO₂ is high.
(C) the partial pressure of O₂ is high and the partial pressure of CO₂ is low.
(D) None of the above
Option b – the partial pressure of O₂ is low and the partial pressure of CO₂ is high.
A Pneumotaxic center is present at
(A) Pons region of the brain
(B) Cerebrum
(C) Cerebellum
(D) Thalamus
Option a – Pons region of the brain
The vital capacity of the lungs is ……..
(A) IRV +TV+ ERV
(B) IRV-ERV
(C) IRV + ERV + TV-RV
(D) IRV + TV
Option a – IRV +TV+ ERV
In mammals, carbon dioxide is transported from tissues to the respiratory surface by
(A) plasma
(B) RBC
(C) WBC
(D) both (A) and (B)
Option d – both (A) and (B)
Which of the following groups of organisms use gills as respiratory organs?
(A) Shark, Tadpole, Scorpion
(B) Dogfish, Flatworms, Earthworms
(C) Shark, Molluscs, Tadpole
(D) Aquatic arthropods, Dogfish, Cockroaches
Option c – Shark, Molluscs, Tadpole
……… prevents the entry of food into the larynx.
(A) Epiglottis
(B) Glottis
(C) Glisson’s capsule
(D) Rugae
Option a – Epiglottis
The volume of air inspired or expired during normal respiration is called as
(A) Inspiratory reserve volume
(B) Tidal volume
(C) Expiratory reserve volume
(D) Residual volume
Option b – Tidal volume
Which of the following is NOT favorable for the formation of an oxygen dissociation curve?
(A) High pO₂2 in alveoli
(B) Low pO₂ in the tissue
(C) Higher temperature
(D) High pCO₂ in the tissue
Option a – High pO₂2 in alveoli
The respiratory rhythm center is located in
(A) cerebrum
(B) medulla oblongata
(C) cerebellum
(D) cerebral cortex
Option b – medulla oblongata
The chemosensitive center in the brain responds to changes in the
(A) the oxygen concentration of the blood.
(B) carbon dioxide concentration of the blood.
(C) calcium level in the blood.
(D) glucose concentration in the blood.
Option b – carbon dioxide concentration of the blood.
The partial pressure of oxygen in the alveoli is about
(A) 50 mm Hg
(B) 200 mm Hg
(C) 104 mm Hg
(D) 40 mm Hg
Option c – 104 mm Hg
Which of the following organisms does not exchange gases by simple diffusion over the entire body surface?
(A) Flatworms
(B) Coelenterates
(C) Arthropods
(D) Poriferans
Option c – Arthropods
Which is the CORRECT sequence of the air passage in a man?
(A) nasal chamber – larynx → pharynx – trachea – bronchioles → bronchi → alveoli
(B) nasal chamber- pharynx → trachea – larynx → bronchi → bronchioles -alveoli
(C) nasal chamber – larynx → bronchi – pharynx → trachea → bronchioles – alveoli
(D) nasal chamber – pharynx larynx – trachea -> bronchi → bronchioles → alveoli
Option d – nasal chamber – pharynx larynx – trachea -> bronchi → bronchioles → alveoli
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