When under certain conditions, the P50 value of haemoglobin rises, the affinity of the pigment of combining with O2 will

1. Remain same

2. Rise

3. Fall

4. First rise and then fall

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
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In human beings, oblique fissures are associated with :

1. Right lung

2. Left lung

3. Both lungs

4. None of the above

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 52%
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Hemoglobin that is bonded to carbon monoxide and therefore cannot transport oxygen, is called

1. carboxyhemoglobin

2. methemoglobin

3. reduced hemoglobin

4. carbaminohemoglobin

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 61%
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Which of the following does not shift the oxy-haemoglobin dissociation curve to the right?

1. increased pH

2. increased carbon dioxide

3. increased temperature

4. increased 2,3 -DPG

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 58%
From NCERT
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Which of the following is entirely made of cartilage?

1. Nasal septum

2. Larynx

3. Glottis

4. Trachea

Subtopic:  Respiratory System: Upper Respiratory Tract |
From NCERT
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Trachea divides into two right and left primary bronchi at the level of:

1. Seventh cervical vertebra

2. Third thoracic vertebra

3. Fifth thoracic vertebra

4. Seventh thoracic vertebra

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 89%
From NCERT
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Contraction of diaphragm:

1. Increases the volume of the thoracic chamber in the antero-posterior axis
2. Increases the volume of the thoracic chamber in the dorso-ventral axis
3. Decreases the volume of the thoracic chamber in the antero-posterior axis
4. Decreases the volume of the thoracic chamber in the dorso-ventral axis
Subtopic:  Respiratory System: Pulmonary Ventilation |
 77%
From NCERT
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Volume of air that will remain in the lungs after a normal expiration is about:

1. 1200 ml

2. 2300 ml

3. 4600 ml

4. 5800 ml

Subtopic:  Respiratory System: Pulmonary Volumes & Capacities |
From NCERT
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The partial pressure of oxygen is equal in

1. Atmospheric air and Alveoli

2. Alveoli and Oxygenated blood

3. Alveoli and Deoxygenated blood

4. Deoxygenated blood and Tissues

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases |
 64%
From NCERT
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The solubility of carbon dioxide is about _____ times higher than that of oxygen across the respiratory membrane.

1. 20-25

2. 25-50

3. 125-150

4. 200-250

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 89%
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