← Back to Zoology

Breathing And Exchange Of Gases

331 Questions Start Allen Test
All Exams Allen Errorless
Q176 Allen (Conceptual Quetions) MCQ
Friction on the lungs surface reduces by
A.
double layered pleura
B.
single layered pleura
C.
ribs covering lungs
D.
mucous membrane surrounding the lungs.
Q177 Allen (Conceptual Quetions) MCQ
In lungs, air is separated from venous blood by:
A.
Squamous epithelium + tunica externa of blood vessel
B.
Squamous epithelium + endothelium of blood vessel
C.
Transitional epithelium + tunica media of blood vessel
D.
Columnar epithelium + 3 layered wall of blood vessel.
Q178 Allen (Conceptual Quetions) MCQ
In lung, gaseous exchange is done by :-
A.
Simple diffusion
B.
Active transport
C.
Passive transport
D.
Facilitated diffusion
Q179 Allen (Conceptual Quetions) MCQ
Which of the following statements is not true?
A.
The partial pressure of $\mathsf { O } _ { 2 }$ in deoxygenated blood is 40 mm Hg.
B.
The partial pressure of $\mathsf { O } _ { 2 }$ in oxygenated blood is 95 mm Hg.
C.
The partial pressure of $\mathsf { O } _ { 2 }$ in alveolar air is 104 mm Hg.
D.
The partial pressure of $\complement 0 _ { 2 }$ in alveolar air is 45 mm Hg.
Q180 Allen (Conceptual Quetions) MCQ
Partial pressure of oxygen in alveoli, atmospheric air and tissue will be
A.
40, 159, 45
B.
40, 0.3, 45
C.
104, 159, 40
D.
104, 0.3, 45
Q181 Allen (Conceptual Quetions) MCQ
What will be the $pO_2$ and ${ \mathsf { p C O } } _ { 2 }$ in the atmospheric air compared to those in the alveolar air?
A.
${ \mathsf { p O } } _ { 2 }$ lesser, ${ \mathsf { p C O } } _ { 2 }$ higher
B.
${ \mathsf { p O } } _ { 2 }$ higher, ${ \mathsf { p C O } } _ { 2 }$ lesser
C.
${ \mathsf { p O } } _ { 2 }$ higher, ${ \mathsf { p C O } } _ { 2 }$ higher
D.
${ \mathsf { p O } } _ { 2 }$ lesser, ${ \mathsf { p C O } } _ { 2 }$ lesser
Q182 Allen (Conceptual Quetions) MCQ
Partial pressure of $\mathsf { C O } _ { 2 }$ is higher :-
A.
At alveolar level
B.
At tissue level
C.
In atmosphere
D.
In oxygenated blood
Q183 Allen (Conceptual Quetions) MCQ
In the given diagram, identify what is depicted by A, B and C. Choose the correct option.
A.
A-Air going out from lungs, B-Ribs and sternum relaxed, C-volume of thorax increased
B.
A-Air entering lungs, B-Ribs and sternum relaxed, C-volume of thorax increased
C.
A-Air entering lungs, B-Ribs and sternum raised, C-volume of thorax increased
D.
A -Air going out from lungs, B-Ribs and sternum relaxed, C-volume of thorax decreased
Q184 Allen (Conceptual Quetions) MCQ
Almost same ${ \mathsf { p O } } _ { 2 }$ in humans is found in
A.
alveoli and tissues
B.
oxygenated blood and deoxygenated blood
C.
alveoli and oxygenated blood
D.
alveoli and deoxygenated blood
Q185 Allen (Conceptual Quetions) MCQ
Arrange the following in the order if increasing volume
(i) Tidal volume
(ii) Residual volume
(iii) Expiratory reserve volume
(iv) Vital capacity
A.
(i) < (ii) < (iii) < (iv)
B.
(i) < (iii) < (ii) < (iv)
C.
(i) < (iv) < (iii) < (ii)
D.
(i) < (iv) < (ii) < (iii)
Q186 Allen (Conceptual Quetions) MCQ
Under normal condition 100 ml blood deliver ________ to tissue.
A.
4 ml $\mathsf { O } _ { 2 }$
B.
10 ml $\mathsf { O } _ { 2 }$
C.
5 ml $\mathsf { O } _ { 2 }$
D.
25 ml $\mathsf { O } _ { 2 }$
Q187 Allen (Conceptual Quetions) MCQ
Effect of $\complement 0 _ { 2 }$ concentration on dissociation of oxyhaemoglobin is called:
A.
Bohr's effect
B.
Haldane effect
C.
Hamburger effect
D.
Root effect
Q188 Allen (Conceptual Quetions) MCQ
Chloride shift occurs for the transport of:
A.
${ { 0 } _ { 2 } }$
B.
$\mathsf { C O } _ { 2 }$
C.
CO
D.
${ { 0 } _ { 3 } }$
Q189 Allen (Conceptual Quetions) MCQ
Exchange of bicarbonates and chloride ions between RBC and plasma is called:-
A.
Chloride shift.
B.
Bohr's effect.
C.
Haldane's effect.
D.
Intra cellular respiration.
Q190 Allen (Conceptual Quetions) MCQ
Determination of oxygen carried by haemoglobin is done by
A.
pH
B.
Partial pressure of oxygen
C.
Partial pressure of carbon dioxide
D.
All the above
Q191 Allen (Conceptual Quetions) MCQ
For proper transport of $\mathsf { O } _ { 2 }$ and ${ \mathsf { C O } } _ { 2 } ,$ , blood should be
A.
Slightly acidic
B.
Strongly acidic
C.
Strongly alkaline
D.
Slightly alkaline
Q192 Allen (Conceptual Quetions) MCQ
What would happen when blood is acidic?
A.
Binding of oxygen with haemoglobin increases
B.
Red blood corpuscles are formed in higher number
C.
Binding of oxygen with haemoglobin decreases
D.
There is no change in oxygen binding nor number of RBC
Q193 Allen (Conceptual Quetions) MCQ
The chloride shift is movement of $Cl^ā€“$
A.
From plasma to RBC
B.
From WBC to plasma
C.
From RBC to plasma
D.
From plasma to WBC
Q194 Allen (Conceptual Quetions) MCQ
Chloride shift occurs in respond to :
A.
$\mathsf { H } ^ { + }$
B.
$\mathsf { K } ^ { + }$
C.
${ \mathsf { H C O } } _ { 3 } ^ { - }$
D.
${ \mathsf { N } } { \mathsf { a } } ^ { + }$
Q195 Allen (Conceptual Quetions) MCQ
What happen to the $\mathsf { O } _ { 2 }$ dissociation curve of Hb if pH is decreased ?
A.
shift to left
B.
shift to right
C.
remain unchanged
D.
will oscillate erratically
Q196 Allen (Conceptual Quetions) MCQ
Dissociation curve shifts to the right when:-
A.
$\mathsf { C O } _ { 2 }$ concentration decreases
B.
$\mathsf { C O } _ { 2 }$ concentration increases
C.
$\mathsf { O } _ { 2 }$ concentration increases
D.
$\mathsf { H } ^ { + }$ concentration decreases
Q197 Allen (Conceptual Quetions) MCQ
Oxyhaemoglobin acts as
A.
Alkali
B.
Acid
C.
Neutral
D.
Buffer
Q198 Allen (Conceptual Quetions) MCQ
The oxygen dissociation curve will show a right shift in case of :-
A.
Less $H^+$ concentration
B.
High partial pressure of $\mathsf { O } _ { 2 }$
C.
Low partial pressure of $\complement 0 _ { 2 }$
D.
High temperature.
Q199 Allen (Conceptual Quetions) MCQ
Which of the following conditions are found in the alveoli of lungs : I. High ${ \mathsf { p O } } _ { 2 }$ II. Low ${ \mathsf { p C O } } _ { 2 }$ III. High ${ \mathsf { p C O } } _ { 2 }$ IV. Low ${ \mathsf { p O } } _ { 2 }$ V. Low $\mathsf { H } ^ { + }$ VI. High $\mathsf { H } ^ { + }$ Choose the correct option.
A.
I, III and V
B.
III, IV and VI
C.
I, IV and VI
D.
I, II and V
Q200 Allen (Conceptual Quetions) MCQ
Binding of $\mathsf { C O } _ { 2 }$ to oxyhaemoglobin occurs when :
A.
${ \mathsf { p C O } } _ { 2 }$ is high and ${ \mathsf { p O } } _ { 2 }$ is less in tissue
B.
${ \mathsf { p C O } } _ { 2 }$ is low and ${ \mathsf { p O } } _ { 2 }$ is high in tissue
C.
${ \mathsf { p C O } } _ { 2 }$ is low and ${ \mathsf { p } } { \mathsf { O } } _ { 2 }$ is low in tissue
D.
${ \mathsf { p C O } } _ { 2 }$ is high and ${ \mathsf { p } } { \mathsf { O } } _ { 2 }$ is high in tissue