CBSE Class 11 Biology Breathing and Exchange of Gases Quiz 1

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CBSE › Class 11 › Biology › Breathing and Exchange of Gases

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1. The function of pneumotaxic centre is

A regulate inspiration B regulate rhythm C increase heart rate D all of the above

2. Which one of the following is NOT correct?

A The nasal cavity warms and humidifies the air before it enters the lungs B The right lung is composed of three lobes, but the left lung has only two lobes C Lung volumes and vital capacity measure lung function. D The visceral pleura is in direct contact with the chest wall.

3. ______ lies in front of esophagus.

A Trachea B Glottis C Larynx D Epiglottis

4. In brain, respiratory control centre lies in

A pons B medulla oblongata C hypothalamus D cerebrum

5. Deoxygenated blood from heart comes to lungs via

A pulmonary vein B systemic vein C pulmonary artery D systemic artery

6. Label the parts of the human respiratory system.

A A- Oesophagus, B- Bronchioles, C- Lungs B A- Trachea, B- Bronchioles, C- Lungs C A- Trachea, B- Bronchus, C- Lungs D A- Oesophagus, B- Bronchioles, C- Pleura

7. Pleura is a layer covering

A heart B kidneys C lungs D brain

8. Rheumatic fever can cause damage

A Alveoli of the Lungs B heart valves C heart muscles D pleural membranes function

9. What protects the moist membranes of the respiratory tract?

A Mucus and cilia B A c shaped cartilage rings C A pebbly epidermal surface D An acidic glands

10. RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by

A RBCs B Plasma C Bicarbonates D All RBCs and bicarbonate carried 70 per cent of carbondixide.

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