Which of the following situations would result in the greatest degree of O2 saturation for haemoglobin, assuming PO2 remains constant-

1.  Increased H+ levels, decreased temperature.

2.  Increased CO2 levels, increased acidity.

3.  Decreased CO2 levels, decreased acidity.

4.  Increased CO2 levels, increased temperature.

Subtopic:  Respiratory System: Exchange of Gases |
 74%
From NCERT
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Consider the characters of a respiratory control center in humans:
I. It is located in pons
II. It moderates the functions of respiratory rhythm center
III. Its absence results in an increase in depth of respiration

The respiratory control center is:

1. Pneumotaxic center

2. Apneustic center

3. Chemosensitive zone

4. Dorsal group

Subtopic:  Respiratory System: Regulation of Respiration |
 94%
From NCERT
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According to Bohr's effect

1.  Hemoglobin oxygen binding affinity is inversely related to acidity.

2.  Hemoglobin oxygen binding affinity is inversely related to concentration of CO2.

3.  Hemoglobin oxygen binding affinity is directly related to acidity.

4.  Both 1 and 2.

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases |
 70%
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Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
 
1. Inflammation of bronchioles; decreased respiratory surface
2. Increased number of bronchioles; increased respiratory surface
3. Increased respiratory surface; inflammation of bronchioles
4. Decreased respiratory surface; inflammation of bronchioles
Subtopic:  Respiratory Disorders: Part 1 | Respiratory Disorders: Part 2 |
 87%
From NCERT
NEET - 2018
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Match the items given Column I with those in Column II and select the correct option given below: 
 
Column I Column II
(a) Tidal volume  (i) 2500-3000 mL 
(b) Inspiratory Reserve (ii) 1100-1200 mL volume 
(c) Expiratory Reserve  (iii) 500-550 mL volume 
(d) Residual volume  (iv) 1000-1100 mL
 
Options: (a) (b) (c) (d)
1. iii ii i iv
2. iii i iv ii
3. i iv ii iii
4. iv iii ii i
Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 85%
From NCERT
NEET - 2018
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Which of the following is an occupational respiratory disorder?
1. Anthracis
2. Silicosis
3. Botulism
4. Emphysema
Subtopic:  Respiratory Disorders - III |
 80%
NEET - 2018
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Asthma may be attributed to?

1. allergic reaction of the mast cells in the lungs
2. inflammation of the trachea
3. accumulation of fluid in the lungs
4. bacterial infection of the lungs

Subtopic:  Respiratory Disorders: Part 1 |
 66%
From NCERT
NEET - 2016
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Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:

1. diaphragm 2. neck
3. tongue 4. epiglottis
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 95%
From NCERT
AIPMT - 2011
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The figure given below shows a small part of the human lung where exchange of gases takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function?

    59000
1. A – Alveolar cavity – main site of exchange of respiratory gases
2. D – Capillary wall – exchange of Oand CO2 takes place here
3. B – Red blood cell –  transport of CO2 mainly.
4. C – Arterial capillary – passes oxygen to tissues
Subtopic:  Respiratory System: Exchange of Gases |
 81%
From NCERT
AIPMT - 2011
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Listed below are four respiratory capacities (1-4) and four jumbled respiratory volumes of a normal human adult. 

Respiratory capacities Respiratory volume
(a) Residual volume 2500 mL
(b) Vital capacity 3500 mL
(c) Inspiratory reserve volume 1200 mL
(d) Inspiratory capacity 4500 mL


Which one of the following is the correct matching of two capacities and volumes?

1. (a) 2500 mL, (d) 4500 mL

2. (c) 1200 mL, (a) 2500 mL

3. (b) 4500 mL, (c) 2500 mL

4. (d) 4500 mL, (b) 3500 mL

Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 57%
From NCERT
AIPMT - 2010
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