The graph below shows tracing of pulmonary volumes during spirometery of a person. Identify A, B, C and D respectively:

1. IRV, TV, ERV and RV
2. IRV, TV, RV and ERV
3. ERV, TV, IRV and RV
4. ERV, IRV, RV and TV

Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
 70%
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The trachea divides into a right and a left primary bronchi at the level of:
1. 3rd thoracic vertebra
2. 5th thoracic vertebra
3. 7th thoracic vertebra
4. 12th thoracic vertebra

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 93%
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Incomplete cartilaginous rings are seen in the walls of all the following except:

1. Trachea 2. Primary bronchus
3. Tertiary bronchus 4. Respiratory bronchiole
Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 80%
From NCERT
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The peripheral chemoreceptors for regulation of respiration are located:
1. adjacent to the rhythm center
2. near arch of aorta and carotid artery
3. in the walls of trachea
4. in the walls of the alveoli

Subtopic:  Respiratory System: Regulation of Respiration |
 61%
From NCERT
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When carbon dioxide combines with haemoglobin in blood, it forms:
1. Carboxyhemoglobin
2. Carbaminohemoglobin
3. Methemoglobin
4. Oxidized hemoglobin

Subtopic:  Respiratory System: Transport of Gases Part 1 |
 83%
From NCERT
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Which of the following has the highest affinity for oxygen?
1. HbS
2. HbA
3. HbF
4. Methemoglobin

Subtopic:  Respiratory System: Transport of Gases |
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Which of the given three layers in the respiratory membrane is/are one-celled thick?

I: Alveolar epithelium
II: Basement substance
III: Vascular endothelium

 

1. Only I 2. Only I and II
3. Only I and III 4. I, II and III
Subtopic:  Respiratory System: Exchange of Gases |
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Which occupational lung disorder can lead to cancer of lung?
1. Silicosis
2. Byssinosis
3. Bagassosis
4. Asbestosis

Subtopic:  Respiratory Disorders: Part 1 |
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It is necessary that lungs must be present in anatomically air-tight chamber because: 

1. we cannot directly alter the pulmonary volume
2. our lungs are not made of any elastic tissue
3. the pleural cavity always has a positive pressure with respect to pulmonary pressure
4. the partial pressure of oxygen in atmosphere is less than that in the alveoli
Subtopic:  Respiratory System: Pulmonary Ventilation |
 78%
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The respiratory diffusion membrane is made of all the following layers except:

1. Alveolar epithelium 2. Basement layer
3. Vascular endothelium 4. Surfactant
Subtopic:  Respiratory System: Exchange of Gases |
 87%
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