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Breathing And Exchange Of Gases

331 Questions Start Allen Test
All Exams Allen Errorless
Q226 Allen PYQ MCQ
The Total Lung Capacity (TLC) is the total volume of air accommodated in the lungs at the end of a forced inspiration. This includes:
A.
RV; IC (Inspiratory Capacity); EC (Expiratory Capacity); and ERV
B.
RV; ERV; IC and EC
C.
RV; ERV; VC (Vital Capacity) and FRC (Functional Residual Capacity)
D.
RV (Residual Volume); ERV (Expiratory Reserve Volume); TV (Tidal Volume); and IRV (Inspiratory Reserve Volume)
Q227 Allen PYQ Match the Columns
Match the following columns and select the correct option : Match Column-I with Column-II:
Column-IColumn-II
(A)Pneumotaxic Centre
(B)O₂ Dissociation
(C)Carbonic Anhydrase
(D)Primary site of exchange of gases
(I)Alveoli
(II)Pons region of brain
(III)Haemoglobin
(IV)R.B.C.
A.
A-I, B-III, C-II, D-IV
B.
A-II, B-III, C-IV, D-I
C.
A-III, B-II, C-IV, D-I
D.
A-IV, B-I, C-III, D-II
Q228 Allen PYQ MCQ
The partial pressures (in mm Hg) of oxygen $( 0 _ { 2 } )$ and carbon dioxide (CO ) at alveoli (the site of diffusion) are :
A.
${ \mathsf { p O } } _ { 2 } = 1 0 4$ and ${ \mathsf { p C O } } _ { 2 } = 4 0$
B.
${ \mathsf p } { \mathsf O } _ { 2 } = 4 0$ and ${ \mathsf { p C O } } _ { 2 } = 4 5$
C.
${ \mathsf p } { \mathsf O } _ { 2 } = 9 5$ and ${ \mathsf { p C O } } _ { 2 } = 4 0$
D.
${ \mathsf p } { \mathsf O } _ { 2 } = 1 5 9$ and ${ \mathsf { p C O } } _ { 2 } = 0 . 3$
Q229 Allen PYQ MCQ
Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.
A.
High ${ \mathsf { p O } } _ { 2 } ,$ low ${ \mathsf { p C O } } _ { 2 } ,$ less ${ \mathsf { H } } ^ { + } ,$ , lower temperature
B.
Low ${ \mathsf { p O } } _ { 2 } ,$ high ${ \mathsf { p C O } } _ { 2 } ,$ more ${ \mathsf { H } } ^ { + } ,$ , higher temperature
C.
High ${ \mathsf { p O } } _ { 2 } ,$ , high ${ \mathsf { p C O } } _ { 2 } ,$ less ${ \mathsf { H } } ^ { + } ,$ , higher temperature
D.
Low ${ \mathsf { p O } } _ { 2 } ,$ low ${ \mathsf { p C O } } _ { 2 } ,$ more ${ \mathsf { H } } ^ { + }$ , higher temperature
Q230 Allen PYQ MCQ
Which of the following is not the function of conducting part of respiratory system ?
A.
Inhaled air is humidified
B.
Temperature of inhaled air is brought to body temperature
C.
Provides surface for diffusion of $\mathsf { O } _ { 2 }$ and $\mathsf { C O } _ { 2 }$
D.
It clears inhaled air from foreign particles
Q231 Allen PYQ MCQ
Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver ml of $\mathsf { O } _ { 2 }$ to the tissues.
A.
5ml
B.
4 ml
C.
10 ml
D.
2 ml
Q232 Allen PYQ MCQ
Which of the following statements are correct with respect to vital capacity?
(a) It includes ERV, TV and IRV (b) Total volume of air a person can inspire after a normal expiration (c) The maximum volume of air a person can breathe in after forced expiration (d) It includes ERV, RV and IRV. (e) The maximum volume of air a person can breath out after a forced inspiration.
Choose the most appropriate answer from the options given below:
A.
(b), (d) and (e)
B.
(a), (c) and (d)
C.
(a), (c) and (e)
D.
(a) and (e)
Q233 Allen PYQ MCQ
Vital capacity of lung is
A.
IRV + ERV + TV + RV
B.
IRV + ERV + TV - RV
C.
IRV + ERV + TV
D.
IRV + ERV
Q234 Allen PYQ MCQ
Select the sequence of steps in Respiration.
(A) Diffusion of gases $( { \mathsf { O } } _ { 2 }$ and $C 0 _ { 2 } )$ across alveolar membrane. (B) Diffusion of $\mathsf { O } _ { 2 }$ and $\mathsf { C O } _ { 2 }$ between blood and tissues. (C) Transport of gases by the blood. (D) Pulmonary ventilation by which atmospheric air is drawn in and $\mathsf { C O } _ { 2 }$ rich alveolar air is released out.
(E) Utilisation of $\mathsf { O } _ { 2 }$ by the cells for catabolic reactions are resultant release of $CO_2$
Choose the correct answer from the
options given below :-
A.
(D), (A), (C), (B), (E)
B.
(C), (B), (A), (E), (D)
C.
(B), (C), (E), (D), (A)
D.
(A), (C), (B), (E), (D)
Q235 Allen PYQ MCQ
Assertion (A) : A person goes to high altitude and experiences ‘Altitude Sickness’ with symptoms like breathing difficulty and heart palpitations. Reason (R) : Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen. In the light of the above statements, choose the correct answer from the options given below :-
A.
(A) is true but (R) is false.
B.
(A) is false but (R) is true.
C.
Both (A) and (R) are true and (R) is the correct explanation of (A).
D.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
Q236 Allen PYQ MCQ
Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?
A.
High ${ \mathsf { p O } } _ { 2 }$ and High ${ \mathsf { p C O } } _ { 2 }$
B.
High ${ \mathsf { p } } { \mathsf { O } } _ { 2 }$ and Lesser $\mathsf { H } ^ { + }$ concentration
C.
Low ${ \mathsf { p C O } } _ { 2 }$ and High $\mathsf { H } ^ { + }$ concentration
D.
Low ${ \mathsf { p C O } } _ { 2 }$ and High temperature
Q237 Allen PYQ Match the Columns
Match Column-I with Column-II Choose the correct answer from the options given below :- Match Column-I with Column-II
Column-IColumn-II
(A)Expiratory capacity
(B)Functional residual capacity
(C)Vital capacity
(D)Inspiratory capacity
(I)Expiratory reserve volume + Tidal volume + Inspiratory reserve volume
(II)Tidal volume + Expiratory reserve volume
(III)Tidal volume + Inspiratory reserve volume
(IV)Expiratory reserve volume + Residual volume
A.
A-II, B-IV, C-I, D-III
B.
A-III, B-II, C-IV, D-I
C.
A-II, B-I, C-IV, D-II
D.
A-I, B-III, C-II, D-IV
Q238 Allen PYQ Match the Columns
Match Column-I Column-II Choose the correct answer from the options given below :-
Column-IColumn-II
(A)Residual Volume
(B)Vital Capacity
(C)Expiratory Capacity
(D)Tidal Volume
(I)Maximum volume of air that can be breathed in after forced expiration.
(II)Volume of air inspired or expired during normal respiration.
(III)Volume of air remaining in lungs after forcible expiration.
(IV)Total volume of air expired after normal inspiration.
A.
A-IV, B-III, C-II, D-I
B.
A-II, B-IV, C-I, D-III
C.
A-III, B-I, C-IV, D-II
D.
A-I, B-II, C-III, D-IV
Q239 Allen PYQ MCQ
Assertion A : During the transportation of gases about 20-25 percent of $\complement 0 _ { 2 }$ is carried by Haemoglobin as carbamino-haemoglobin. Reason R : This binding is related to high ${ \mathsf { p C O } } _ { 2 }$ and low ${ \mathsf { p O } } _ { 2 }$ in tissues. In the light of the above statements, choose the correct answer from the options given below :
A.
A is true but R is false
B.
A is false but R is true
C.
Both A and R are true and R is the correct explanation of A.
D.
Both A and R are true but R is NOT the correct explanation of A.
Q240 Allen NCERT BASED QUESTIONS MCQ
Which is a common passage for food and air?
A.
Trachea
B.
Oesophagus
C.
Pharynx
D.
Glottis
Q241 Allen NCERT BASED QUESTIONS MCQ
The function of conducting part in respiratory system of human is :-
A.
Clears foreign particles.
B.
Humidifies atmospheric air
C.
Brings the air to body temperature
D.
All of the above
Q242 Allen NCERT BASED QUESTIONS MCQ
When there is no air in initial bronchioles, they does not collapse. It is due to :-
A.
Presence of Lecithin
B.
Presence of incomplete cartilaginous rings
C.
Presence of complete cartilaginous rings
D.
Presence of mucous
Q243 Allen NCERT BASED QUESTIONS MCQ
Which of the following steps not involved in respiration?
A.
Diffusion of gases across alveolar membrane
B.
Transport of gases by the blood
C.
Provide nutrients to all the living cells of body
D.
Utilisation of $O_2$
by the cells for catabolic reactions and resultant release of $CO_2$.
Q244 Allen NCERT BASED QUESTIONS MCQ
Inspiration can occur, when –
A.
Pressure within the lungs is less than the atmospheric pressure.
B.
Pressure within the lungs is more than the atmospheric pressure.
C.
Pressure within the lungs and atmospheric air is same.
D.
No effect of pressure on inspiration.
Q245 Allen NCERT BASED QUESTIONS MCQ
By the contraction in diaphragm volume of thoracic chamber increases in the :-
A.
Dorso-ventral axis
B.
Antero-posterior axis
C.
Dorso-posterior axis
D.
Antero-ventral axis
Q246 Allen NCERT BASED QUESTIONS MCQ
The primary muscle of inspiration is :-
A.
Diaphragm
B.
Intercostal muscle
C.
Abdominal muscle
D.
Oblique muscle
Q247 Allen NCERT BASED QUESTIONS MCQ
Total volume of air a person can expire after normal inspiration is :-
A.
Vital capacity
B.
Functional residual capacity
C.
Inspiratory capacity
D.
Expiratory capacity
Q248 Allen NCERT BASED QUESTIONS MCQ
Which of the following factor can affect the rate of diffusion of gases?
A.
Thickness of the membranes involved in diffusion
B.
Solubility of the gases
C.
Pressure of the gases
D.
All of these
Q249 Allen NCERT BASED QUESTIONS MCQ
Which of the following is correct?
A.
Alveoli-pO₂=159 mmHg, Deoxygenated blood-pCO₂=40 mmHg, Tissue-pCO₂=20 mmHg
B.
Alveoli-pCO₂=40 mmHg, Deoxygenated blood-pO₂=95 mmHg, Tissue-pO₂=40 mmHg
C.
Alveoli-pO₂=104 mmHg, Deoxygenated blood-pCO₂=45 mmHg, Tissue-pCO₂=45 mmHg
D.
Alveoli-pO₂=40 mmHg, Deoxygenated blood-pO₂=40 mmHg, Tissue-pCO₂=45 mmHg
Q250 Allen NCERT BASED QUESTIONS MCQ
What is true about diffusion capacity?
A.
Diffusion capacity of $\mathsf { C O } _ { 2 }$ is much higher than ${ { 0 } _ { 2 } }$
B.
Diffusion capacity of $\mathsf { O } _ { 2 }$ is much higher than $\mathsf { C O } _ { 2 }$
C.
Diffusion capacity of $\mathsf { O } _ { 2 }$ and $\mathsf { C O } _ { 2 }$ is same
D.
None of the above