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Breathing And Exchange Of Gases

331 Questions Start Allen Test
All Exams Allen Errorless
Q251 Allen NCERT BASED QUESTIONS MCQ
Which of the following statement is true?
A.
20-25 percent $\complement \mathsf { O } _ { 2 }$ is transported by RBCs.
B.
97 percent $\mathsf { O } _ { 2 }$ is transported by RBCs.
C.
70 percent $\mathsf { C O } _ { 2 }$ is carried as bicarbonate.
D.
All of these are true.
Q252 Allen NCERT BASED QUESTIONS MCQ
Binding of oxygen with haemoglobin is primarily related to :-
A.
Partial pressure of $\mathsf { O } _ { 2 }$
B.
Partial pressure of $\complement \mathsf { O } _ { 2 }$
C.
$H^+$ ion concentration
D.
Temperature
Q253 Allen NCERT BASED QUESTIONS MCQ
In which the following factors can interfere in binding of $\mathsf { O } _ { 2 }$ with haemoglobin. A ā†’ $pCO_2$, B ā†’ $H^+$ ion concentration C ā†’ Temperature
A.
Only A
B.
B, C
C.
A and C
D.
A, B, C
Q254 Allen NCERT BASED QUESTIONS MCQ
The conditions which are favourable for the formation of oxyhaemoglobin :-
A.
pOā‚‚ā†‘, pCOā‚‚ā†‘, Hāŗ concentrationā†“, Temperatureā†“
B.
pOā‚‚ā†“, pCOā‚‚ā†“, Hāŗ conc.ā†‘, Temperatureā†‘
C.
pOā‚‚ā†‘, pCOā‚‚ā†“, Hāŗ conc.ā†“, Temperatureā†“
D.
pOā‚‚ā†‘, pCOā‚‚ā†‘, Hāŗ conc.ā†“, Temperatureā†‘
Q255 Allen NCERT BASED QUESTIONS MCQ
Which of the following statement/s is/are correct?
(A) High concentration of carbonic anhydrase is present in RBCs. (B) Minute quantities of carbonic anhydrase is present in plasma. (C) Every 100 ml blood delivers approximately 4 ml of $\mathsf { C O } _ { 2 }$ to the alveoli. (D) 20-25% $\complement 0 _ { 2 }$ is carried by haemoglobin as carbaminohaemoglobin.
A.
A, C and D
B.
A and D
C.
A, B, C and D
D.
Only A
Q256 Allen NCERT BASED QUESTIONS MCQ
Which of the following statement is incorrect?
A.
Among vertebrates, fishes use gills whereas amphibians, reptiles, birds and mammals respire through lungs.
B.
Mechanisms of breathing vary among different groups of animals depending mainly on their habitats and levels of organisation.
C.
Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange $\mathsf { O } _ { 2 }$ with $\mathsf { C O } _ { 2 }$ by osmosis over their entire body surface.
D.
Earthworms use their moist cuticle and insects have a network of tubes (tracheal tubes) to transport atmospheric air within the body
Q257 Allen NCERT BASED QUESTIONS MCQ
A chemo sensitive area is situated adjacent to respiratory rhythm centre which is highly sensitive to and ions.
A.
$\mathsf { O } _ { 2 } , \mathsf { H } ^ { + }$
B.
${ \mathsf { C O } } _ { 2 } , { \mathsf { O H } } ^ { - }$
C.
${ \mathsf { C O } } _ { 2 } , { \mathsf { H } } ^ { + }$
D.
${ \mathsf { C O } } _ { 2 } , { \mathsf { O } } _ { 2 }$
Q258 Allen NCERT BASED QUESTIONS MCQ
Label A, B, C and D in the diagram given below
A.
Aā€“Nasopharynx, Bā€“Oropharynx, Cā€“Glottis, Dā€“Gullet
B.
Aā€“Nasopharynx, Bā€“Oropharynx, Cā€“Gullet, Dā€“Glottis
C.
Aā€“Oropharynx, Bā€“Nasopharynx, Cā€“Gullet, Dā€“Glottis
D.
Aā€“Oropharynx, Bā€“Nasopharynx, Cā€“Glottis, Dā€“Gullet
Q259 Allen NCERT BASED QUESTIONS MCQ
Chronic disorder in which alveolar wall are damaged due to which respiratory surface is decreased. One of the major causes of this is cigarette smoking :-
A.
Asthma
B.
Emphysema
C.
Bronchitis
D.
Fibrosis
Q260 Allen NCERT BASED QUESTIONS MCQ
What is the correct about alveoli?
A.
Thin, irregular-walled and vascularised bag-like structures
B.
Thick, irregular-walled and vascularised bag-like structures
C.
Thin, regular-walled and vascularised bag-like structures
D.
Thick, regular-walled and vascularised bag-like structures
Q261 Allen NCERT BASED QUESTIONS MCQ
Total volume of air accommodate in the lungs at the end of forced inspiration :-
A.
TV + IRV
B.
TV + IRV + ERV
C.
TV + ERV
D.
TV + IRV + ERV + RV
Q262 Allen NCERT BASED QUESTIONS MCQ
Mark the true statement among the following with reference to normal breathing
A.
Inspiration is a passive process where as expiration is active
B.
Inspiration is a active process where as expiration is passive
C.
Inspiration and expiration are active processes
D.
Inspiration and expiration are passive processes
Q263 Allen NCERT BASED QUESTIONS MCQ
A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is
A.
Total lung capacity
B.
Tidal volume
C.
Vital capacity
D.
Inspiratory capacity
Q264 Allen NCERT BASED QUESTIONS MCQ
Mark the correct pair of muscles involved in the normal breathing in humans :-
A.
External and internal intercostal muscles
B.
Diaphragm and abdominal muscles
C.
Diaphragm and external intercostal muscles
D.
Diaphragm and internal intercostal muscles
Q265 Allen NCERT BASED QUESTIONS MCQ
The diffusion membrane is made up of three major layers namely.
A.
The thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them.
B.
The thick squamous epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them.
C.
The thin columnar epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them.
D.
The thin columnar and cuboidal epithelium of alveoli, the endothelium of alveolar capillaries and the basement substance in between them.
Q266 Allen NCERT BASED QUESTIONS MCQ
Which of the following group of animals, is used lungs for respiration?
A.
Fishes, Frog, Tadpole larva
B.
Fish, Mollusca, aquatic arthropods
C.
Reptiles, Birds, Mammals
D.
Insects, Earthworm, Mollusca
Q267 Allen ANALYTICAL QUESTIONS MCQ
Whether a child died after normal birth or died before birth can be confirmed by measuring :
A.
Tidal volume of air
B.
Residual volume of air
C.
The weight of the child
D.
The dead space air
Q268 Allen ANALYTICAL QUESTIONS MCQ
Find the correct option for the diagram given below :
A.
Aā€“Parietal pleura, Bā€“Visceral pleura, Cā€“Pleural cavity filled with pleural fluid
B.
Aā€“Visceral pleura, Bā€“Parietal pleura, Cā€“Pleural cavity filled with pleural fluid
C.
Aā€“Parietal pericardium, Bā€“Visceral pericardium, Cā€“Pleural cavity filled with pleural fluid
D.
Aā€“Visceral pericardium, Bā€“Parietal pericardium, Cā€“Pleural cavity filled with pleural fluid
Q269 Allen ANALYTICAL QUESTIONS MCQ
Which of the following statement is correct?
A.
Alveoli are the primary sites of exchange of gases
B.
Exchange of gases occur at tissue level and alveolar surface.
C.
Pressure contributed by an individual gas in a mixture of gases is called partial pressure and is represented as $pO_2$ for oxygen and $pCO_2$ for carbon dioxide.
D.
All of the above.
Q270 Allen ANALYTICAL QUESTIONS MCQ
Identify A, B and C in the given sentence Inspiration is initiated by ______ A_____ of diaphragm which____ B ____the volume of thoracic chamber in _____C _____axis.
A.
Aā€“relaxation, Bā€“increases, Cā€“antero posterior axis
B.
Aā€“contraction, Bā€“decreases, Cā€“antero posterior axis
C.
Aā€“contraction, Bā€“increases, Cā€“antero posterior axis
D.
Aā€“relaxation, Bā€“contraction, Cā€“antero posterior axis
Q271 Allen ANALYTICAL QUESTIONS MCQ
In lungs, there is definite exchange of ions between RBC and Plasma. Removal of COā‚‚ from blood involves :
A.
efflux of Clā» ions from RBC.
B.
influx of Clā» ions into RBC.
C.
influx of HCOā‚ƒā» ions into Plasma.
D.
efflux of HCOā‚ƒā» ions from RBC.
Q272 Allen ANALYTICAL QUESTIONS MCQ
The chloride content of RBC will be higher than that of plasma in :-
A.
Systemic arteries and pulmonary veins.
B.
Systemic veins and pulmonary arteries.
C.
Systemic arteries and pulmonary arteries.
D.
Systemic veins and pulmonary veins.
Q273 Allen ANALYTICAL QUESTIONS MCQ
Which of the following lung volumes or capacities can be measured by spirometer?
A.
Functional residual capacity [FRC]
B.
Residual volume
C.
Total lung capacity [TLC]
D.
Vital capacity
Q274 Allen ANALYTICAL QUESTIONS MCQ
Which of the following statement is incorrect?
A.
A healthy man can inspire or expire approximately 6000 to 8000 ml of air per second.
B.
Total volume of air that can accommodated in the lungs at the end of forced inspiration is called total lung capacity.
C.
Total volume of air a person can expire after a normal inspiration is called expiratory capacity.
D.
Amount of air remain in lungs even after deep and forceful expiration is called residual volume of air.
Q275 Allen ANALYTICAL QUESTIONS MCQ
The respiratory membrane facilitates the exchange of respiratory gases through diffusion. Oxygen enters the deoxygenated blood through diffusion because :-
A.
Partial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 104 mm Hg respectively.
B.
Partial pressure of oxygen in alveolar air and capillaries is 104 mm Hg and 40 mm Hg respectively.
C.
Partial pressure of oxygen in alveolar air and capillaries is 46 mm Hg and 40mm Hg respectively.
D.
Partial pressure of oxygen in alveolar air and capillaries is 40 mm Hg and 46 mm Hg respectively.