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Breathing And Exchange Of Gases

331 Questions Start Allen Test
All Exams Allen Errorless
Q201 Allen (Conceptual Quetions) MCQ
In Bohr's effect, curve shift to right when :-
A.
${ \mathsf { p C O } } _ { 2 }$ decreases and $\mathsf { p } 5 0 0 _ { 2 }$ increases
B.
${ \mathsf { p C O } } _ { 2 }$ increases and $\mathsf { p } 5 0 0 _ { 2 }$ decreases
C.
${ \mathsf { p C O } } _ { 2 }$ increases and $\mathsf { p } 5 0 0 _ { 2 }$ increases
D.
${ \mathsf { p C O } } _ { 2 }$ increases and p50 $\mathsf { O } _ { 2 }$ decreases and pH increases
Q202 Allen (Conceptual Quetions) MCQ
In which three forms $\mathsf { C O } _ { 2 }$ is transported by blood?
A.
As a solution, Carbamino compounds, bicarbonates
B.
As a solution, Carbamino proteins, ${ \sf K H C O 3 }$
C.
As a solution, Carbamino haemoglobin, NaH $\mathsf { I C O } _ { 3 }$
D.
As a solution, Carbamino compound, ${ \sf H } _ { 2 } { \sf C } { \sf O } _ { 3 }$
Q203 Allen (Conceptual Quetions) MCQ
H. Hb is :-
A.
$H_2$ b
B.
Heavy hydrogen bond
C.
Reduced bromide
D.
Haemoglobin acid
Q204 Allen (Conceptual Quetions) MCQ
During transport of $\mathsf { C O } _ { 2 } ,$ blood does not become acidic due to :
A.
Neutralisation of ${ \sf H } _ { 2 } { \sf C } { \sf O } _ { 3 }$ by ${ \sf N a } _ { 2 } { \sf C O } _ { 3 }$
B.
Absorption by leucocytes
C.
Blood buffers
D.
Non-accumulation
Q205 Allen (Conceptual Quetions) MCQ
Rate of respiration is directly affected by
A.
$\mathsf { C O } _ { 2 }$ concentration
B.
${ { 0 } _ { 2 } }$ in trachea
C.
Concentration of $\mathsf { O } _ { 2 }$
D.
Diaphragm expansion
Q206 Allen (Conceptual Quetions) MCQ
CO is more toxic than $\mathsf { C O } _ { 2 }$ because it :
A.
Damages lungs
B.
It destroys haemoglobin
C.
Affects the nervous system
D.
Reduces the oxygen carrying capacity of haemoglobin
Q207 Allen (Conceptual Quetions) MCQ
Carbon monoxide has greater affinity for haemoglobin as compare to oxygen :-
A.
1000 Times
B.
200 Times
C.
20 Times
D.
2 Times
Q208 Allen (Conceptual Quetions) MCQ
About 97% of oxygen is transported by RBC remaining 3% is :-
A.
Dissolved in plasma & transported
B.
Retained in lungs
C.
Attached to cell membranes
D.
Found inside mitochondria
Q209 Allen (Conceptual Quetions) MCQ
Increased asthmatic attacks in certain seasons are related to :-
A.
Hot and humid environment
B.
Eating fruits preserved in tin containers
C.
Inhalation of seasonal pollen
D.
Low temperature
Q210 Allen (Conceptual Quetions) MCQ
Disease aggravated by pollution is :-
A.
Haemophilia
B.
Rheumatism
C.
Scurvy
D.
Bronchitis
Q211 Allen (Conceptual Quetions) Match the Columns
represents diseases and represents their symptoms. Which of the following pairs are correctly matched for them? Match with
Column-IColumn-II
(P)Asthma
(Q)Emphysema
(R)Pneumonia
(I)Damaged alveolar walls
(II)Accumulation of W.B.C. in alveolus
(III)Allergy
A.
P-III, Q-II, R-I
B.
P-III, Q-I, R-II
C.
P-II, Q-III, R-I
D.
P-I, Q-II, R-III
Q212 Allen PYQ MCQ
Approximately seventy percent of carbondioxide absorbed by the blood will be transported to the lungs:
A.
as bicarbonate ions
B.
in the form of dissolved gas molecules
C.
by binding to R.B.C.
D.
as carbamino - haemoglobin
Q213 Allen PYQ MCQ
When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe?
A.
rising $\mathsf { C O } _ { 2 }$ concentration
B.
falling $\mathsf { C O } _ { 2 }$ concentration
C.
rising $\mathsf { C O } _ { 2 }$ and falling ${ { 0 } _ { 2 } }$ concentration
D.
falling $O_2$ concentration
Q214 Allen PYQ MCQ
Asthma may be attributed to :
A.
bacterial infection of the lungs
B.
allergic reaction of the mast cells in the lungs
C.
inflammation of the trachea
D.
accumulation of fluid in the lungs
Q215 Allen PYQ MCQ
The partial pressure of oxygen in the alveoli of the lungs is :-
A.
Less than that in the blood
B.
Less than that of carbon dioxide
C.
Equal to that in the blood
D.
More than that in the blood
Q216 Allen PYQ MCQ
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because :-
A.
There is a positive intrapleural pressure
B.
Pressure in the lungs is higher than the atmospheric pressure.
C.
There is a negative pressure in the lungs.
D.
There is a negative intrapleural pressure pulling at the lung walls
Q217 Allen PYQ MCQ
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:
A.
Inspiratory Reserve Volume
B.
Tidal Volume
C.
Expiratory Reserve Volume
D.
Residual Volume
Q218 Allen PYQ MCQ
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
A.
Inflammation of bronchioles;
Decreased respiratory surface
B.
Increased number of bronchioles;
Increased respiratory surface
C.
Increased respiratory surface;
Inflammation of bronchioles
D.
Decreased respiratory surface;
Inflammation of bronchioles
Q219 Allen PYQ Match the Columns
Match the items given in column-I with those in column-II and select the correct option given below:
Match Column-I with Column-II:
Column-IColumn-II
(A)tidal volume
(B)inspiratory reserve volume
(C)expiratory reserve volume
(D)residual volume
(I)2500–3000 ml
(II)1100–1200 ml
(III)500–550 ml
(IV)1000–1100 ml
A.
A-III, B-I, C-IV, D-II
B.
A-III, B-I, C-IV, D-II
C.
A-III, B-IV, C-II, D-III
D.
A-IV, B-III, C-II, D-I
Q220 Allen PYQ MCQ
Which of the following is an occupational respiratory disorder ?
A.
Anthracis
B.
Silicosis
C.
Botulism
D.
Emphysema
Q221 Allen PYQ MCQ
Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
A.
1500 mL
B.
1700 mL
C.
2200 mL
D.
2700 mL
Q222 Allen PYQ MCQ
Select the correct statement.
A.
Expiration occurs due to external intercostal muscles
B.
Intrapulmonary pressure is lower than the atmospheric pressure during inspiration.
C.
Inspiration occurs when atmospheric pressure is less than intrapulmonary pressure.
D.
Expiration is initiated due to contraction of diaphragm.
Q223 Allen PYQ MCQ
The maximum volume of air a person can breathe in after a forced expiration is known as:
A.
Expiratory Capacity
B.
Vital Capacity
C.
Inspiratory Capacity
D.
Total lung Capacity
Q224 Allen PYQ MCQ
Identify the wrong statement with reference to transport of oxygen.
A.
Low pCO₂ in alveoli favours the formation of oxyhaemoglobin.
B.
Binding of oxygen with haemoglobin is mainly related to partial pressure of O₂.
C.
Partial pressure of CO₂ can interfere with O₂ binding with haemoglobin.
D.
Higher H⁺ conc. in alveoli favours the formation of oxyhaemoglobin.
Q225 Allen PYQ MCQ
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm (b) Contraction of external inter-costal muscles (c) Pulmonary volume decreases (d) Intra pulmonary pressure increases
A.
only (d)
B.
(a) and (b)
C.
(c) and (d)
D.
(a), (b) and (d)