Which of the following is entirely made of cartilage?

1. Nasal septum

2. Larynx

3. Glottis

4. Trachea

Subtopic:  Respiratory System: Upper Respiratory Tract |
 59%
From NCERT
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Trachea divides into two a 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 |
 93%
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 |
 81%
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 |
 53%
From NCERT
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The partial pressure of oxygen is equal

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 |
 68%
From NCERT
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A center that moderates the functions of the respiratory rhythm center is located in:

1. Dorsal medulla oblongata

2. Ventral medulla oblongata

3. Pons Varolii

4. Pre central gyrus of the cerebrum

Subtopic:  Respiratory System: Regulation of Respiration |
 65%
From NCERT
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The following statements refer to gas carriage by the blood. Find the correct statement.

1. After leaving the lungs, each litre of blood contains about 20 ml of oxygen.

2. Haemoglobin is half saturated with oxygen when the PO2 is about 30 mm Hg

3. As the PCO2 rises, the affinity of haemoglobin for oxygen is increased.

4. Each litre of arterial blood contains about 50 mL of carbon dioxide

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 55%
From NCERT
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In the given diagram of the oxygen dissociation curve, under normal physiological conditions, the partial pressure of oxygen at the tissue level is represented by :

1. A

2. B

3. C

4. D

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
From NCERT
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Which of the following is true about respiration?
(1)it is for energy liberation
(2)it can occur both O2 presence and its absence
(3)In humans R.B.C show anaerobic respiration
(4)All of these

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
 74%
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Choose the wrong statement
(1)CO2 is the harmful molecule and released during catabolic reactions
(2)respiration will always require O2
(3)Breathing is a part of respiration
(4)All of the above

Subtopic:  Respiratory System: Trachea & Basic Anatomy of Lung |
From NCERT
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