Breathing & Exchange of GasesNEET PYQ
(2) Allergic reaction of the mast cells in the lungs
(3) Inflammation of the trachea
(4) Accumulation of fluid in the lungs
Answer: (2)
(2) Less than that of carbon dioxide
(3) Equal to that in the blood
(4) More than that in the blood
Answer: (4)
Q3. Lungs do not collapse between breaths and some air always
remains in the lungs which can never be expelled because: NEET 2017
(2) Pressure in the lungs is higher than the atmospheric pressure
(4) There is a negative intrapleural pressure pulling at the lung walls
Answer: (4)
Q4. Lungs are made up of air-filled sacs, the alveoli. They do
not collapse even after forceful expiration, because of: NEET 2018
(2) Tidal Volume
(3) Expiratory Reserve Volume
(4) Residual Volume
Answer: (4)
Q5. Which of the following options correctly represents the lung
conditions in asthma and emphysema, respectively? NEET 2018
(2) Increased number of bronchioles; Increased respiratory surface
(3) Increased respiratory surface; Inflammation of bronchioles
(4) Decreased respiratory surface; Inflammation of bronchioles
Answer: (1)
Q6.
Which of the following is an occupational respiratory disorder? NEET 2019
(1) Anthracis
(2) Silicosis
(3) Botulism
(4) Emphysema
Answer: (2)
Q7.
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? NEET
2019
(1) 1500 mL
(2) 1700 mL
(3) 2200 mL
(4) 2700 mL
Answer: (1)
Q8.
Select the correct statement. NEET 2019 (ODISHA)
(1) Expiration
occurs due to external intercostal muscles
(2) Intrapulmonary
pressure is lower than the atmospheric pressure during inspiration
(3)
Inspiration occurs when atmospheric pressure is less than intrapulmonary
pressure
(4) Expiration is initiated due to contraction of diaphragm
Answer: (2)
Q9.
The maximum volume of air a person can breathe in after a forced expiration is
known as: NEET
2019 (ODISHA)
(1) Expiratory
Capacity
(2) Vital Capacity
(3) Inspiratory
Capacity
(4) Total lung
Capacity
Answer: (2)
Q10.
Identify the wrong statement with reference to transport of oxygen. NEET 2020
(1) Low pCO2 in
alveoli favours the formation of oxyhaemoglobin
(2) Binding of
oxygen with haemoglobin is mainly related to partial pressure of O2
(3) Partial
pressure of CO2 can interfere with O2 binding with haemoglobin
(4) Higher H+
conc. in alveoli favours the formation of oxyhaemoglobin
Answer: (4)
Q11.
Select the correct events that occur during inspiration. NEET 2020
(a) Contraction of
diaphragm,
(b) Contraction of
external inter-costal muscles,
(c) Pulmonary
volume decreases,
(d) Intra
pulmonary pressure increases
(1) only (d)
(2) (a) and (b)
(3) (c) and (d)
(4) (a), (b) and
(c) Answer: (2)
Q12.
The Total Lung Capacity (TLC) is the total volume of air accommodated in the
lungs at the end of a forced inspiration. This includes: NEET 2020
(1) RV; IC; EC and
ERV
(2) RV; ERV; IC
and EC
(3) RV; ERV; VC
and FRC
(4) RV; ERV; TV;
and IRV
Answer: (4)
13.
Match the following columns and select the correct option : NEET 2020
|
Column - I |
Column - II |
|
(a) Pneumotaxic
Centre |
(i) Alveoli |
|
(b) O2
Dissociation curve |
(ii) Pons region
of brain |
|
(c) Carbonic
Anhydrase |
(iii)
Haemoglobin |
|
(d) Primary site
of exchange of gases |
(iv) R.B.C. |
|
(1) (a)-(i),
(b)-(iii), (c)-(ii), (d)-(iv) |
|
|
(2) (a)-(ii),
(b)-(iii), (c)-(iv), (d)-(i) |
|
|
(3) (a)-(iii),
(b)-(ii), (c)-(iv), (d)-(i) |
|
|
(4) (a)-(iv),
(b)-(i), (c)-(iii), (d)-(ii) |
Answer: (2)
14.
The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at
alveoli (the site of diffusion) are : NEET 2021
(1) pO2 = 104 and
pCO2 = 40
(2) pO2 = 40 and
pCO2 = 45
(3) pO2 = 95 and
pCO2 = 40
(4) pO2 = 159 and
pCO2 = 0.3
Answer: (1)
15.
Select the favourable conditions required for the formation of oxyhaemoglobin
at the alveoli.
NEET 2021
(1) High pO2, low
pCO2, less H+, lower temperature
(2) Low pO2, high
pCO2, more H+, higher temperature
(3) High pO2, high
pCO2, less H+, higher temperature
(4) Low pO2, low
pCO2, more H+, higher temperature
Answer: (1)
16.
Match the columns and find the correct combination. NEET 2021
|
Column I
(Organism) |
Column II
(Respiratory Organ) |
|
a. Earthworm |
i. Pulmonary |
|
b. Human |
ii. Branchial |
|
c. Prawn |
iii. Tracheal |
|
d. Insects |
iv. Cutaneous |
|
(1) a-i, b-ii,
c-iii, d-iv |
|
|
(2) a-iv, b-i,
c-ii, d-iii |
|
|
(3) a-iii, b-ii,
c-iv, d-i |
|
|
(4) a-iv, b-ii,
c-i, d-iii |
Answer: (2)
17. Under normal physiological conditions in human being
every 100 ml of oxygenated blood can deliver ________ ml of O2 to the tissues.
NEET 2022
(1) 5ml
(2) 4 ml
(3) 10 ml
(4) 2 ml
Answer: (1)
18.
Which of the following is not the function of conducting part of respiratory
system?
NEET 2022
(1) Inhaled air is
humidified
(2) Temperature of
inhaled air is brought to body temperature
(3) Provides
surface for diffusion of O2 and CO2
(4) It clears
inhaled air from foreign particles
Answer: (3)
19.
Which of the following disorders represents decrease in respiratory surface due
to damaged alveolar walls? NEET 2022 (OVERSEAS)
(1) Bronchitis
(2) Asthma
(3) Emphysema
(4) Hypocapnia
Answer: (3)
20.
In the regulation of respiration, a chemo-sensitive area adjacent to the rhythm
centre in the medulla region of the brain, is highly sensitive to : NEET 2022 (OVERSEAS)
(1) CO2
(2) O2
(3) N2
(4) HCO3-
Answer: (1)
21.
Which of the following statements are correct with respect to vital capacity? NEET 2022
(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
(1) (b), (d) and
(e)
(2) (a), (c) and
(d)
(3) (a), (c) and
(e)
(4) (a) and (e)
Answer: (3)
22.
Identify the region of human brain which has pneumotaxic centre that alters
respiratory rate by reducing the duration of inspiration. NEET 2022
(1) Medulla
(2) Pons
(3) Thalamus
(4) Cerebrum
Answer: (2)
23.
Vital capacity of lung is ________. NEET 2023
(1) IRV + ERV + TV
+ RV
(2) IRV + ERV + TV
- RV
(3) IRV + ERV + TV
(4) IRV + ERV
Answer: (3)
24.
Select the sequence of steps in Respiration : NEET 2023
(A) Diffusion of
gases (O2 and CO2) across alveolar membrane.
(B) Diffusion of
O2 and CO2 between blood and tissues.
(C) Transport of
gases by the blood.
(D) Pulmonary
ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is
released out.
(E) Utilisation of
O2 by the cells for catabolic reactions are resultant release of CO2.
(1) (D), (A), (C),
(B), (E)
(2) (C), (B), (A),
(E), (D)
(3) (B), (C), (E),
(D), (A)
(4) (A), (C), (B),
(E), (D)
Answer: (1)
25. Which of the following
factors are favourable for the formation of oxyhaemoglobin in alveoli? : NEET 2024
1. High pO2 and High pCO2
2. High pO2 and lesser H+ concentration
3. Low pCO2 and High H+ concentration
4. Low pCO2 and High temperature
Answer:(2)
26. Frogs respire in water by skin and
buccal cavity and on land by skin, buccal cavity and lungs. NEET 2025
Choose the correct answer
from the following
2.The statement is false for both the environment
3.The statement is true for water but false for land
4.The statement is true for both the environment
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