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Class 11 Biology
Breathing And Exchange Of Gases
Quiz 1
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The function of pneumotaxic centre is
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regulate inspiration
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regulate rhythm
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increase heart rate
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all of the above
Explanation
regulate inspiration
Which one of the following is NOT correct?
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The nasal cavity warms and humidifies the air before it enters the lungs
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The right lung is composed of three lobes, but the left lung has only two lobes
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Lung volumes and vital capacity measure lung function.
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The visceral pleura is in direct contact with the chest wall.
Explanation
The visceral pleura is in direct contact with the chest wall.
______ lies in front of esophagus.
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Trachea
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Glottis
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Larynx
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Epiglottis
Explanation
Trachea
In brain, respiratory control centre lies in
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pons
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medulla oblongata
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hypothalamus
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cerebrum
Explanation
medulla oblongata
Deoxygenated blood from heart comes to lungs via
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pulmonary vein
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systemic vein
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pulmonary artery
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systemic artery
Explanation
pulmonary artery
Label the parts of the human respiratory system.
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A- Oesophagus, B- Bronchioles, C- Lungs
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A- Trachea, B- Bronchioles, C- Lungs
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A- Trachea, B- Bronchus, C- Lungs
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A- Oesophagus, B- Bronchioles, C- Pleura
Explanation
A- Trachea, B- Bronchus, C- Lungs
Pleura is a layer covering
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heart
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kidneys
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lungs
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brain
Explanation
lungs
Rheumatic fever can cause damage
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Alveoli of the Lungs
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heart valves
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heart muscles
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pleural membranes function
Explanation
heart valves
What protects the moist membranes of the respiratory tract?
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Mucus and cilia
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A c shaped cartilage rings
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A pebbly epidermal surface
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An acidic glands
Explanation
Mucus and cilia
RBCs, plasma and biocarbonate are the medium for transport of carbondioxide. Maximum amount of carbon dioxide is carried by
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RBCs
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Plasma
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Bicarbonates
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All RBCs and bicarbonate carried 70 per cent of carbondixide.
Explanation
Bicarbonates
The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the ______.
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Total lung capacity
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Vital capacity
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Tidal volume
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Ventilation rate
Explanation
Vital capacity
Which one of the followings is correct regarding larynx?
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It prevents foreign objects from entering the trachea
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It houses the vocal cords
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It is an organ made of cartilage and connects the pharynx to the trachea
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All of these are correct
Explanation
All of these are correct
Which of the following statements is true about Trachea in a respiratory system?
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It functions as passages of air to each alveolus
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It functions for sound production
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It Acts as passage of air to bronchi
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It Lowers the surface tension
Explanation
It Acts as passage of air to bronchi
Trachea divides into bronchi at
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4th thoracic vertebra
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5th thoracic vertebra
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6th thoracic vertebra
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7th thoracic vertebra
Explanation
5th thoracic vertebra
Aerobic respiratory pathway is also termed as ______ pathway.
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Anabolic
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Catabolic
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Creatine phosphate
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Amphibolic
Explanation
Amphibolic
The oxygen dissociation curve is shifted to the right by an increase in ______.
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H+ concentration
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PCO
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temperature
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All of these
Explanation
All of these
The maximum volume of air contained in the lung by a full forced inhalation is called
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Vital capacity
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Tidal volume
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Total lung capacity
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Inspiratory capacity
Explanation
Total lung capacity
Which organ lies in thoracic cavity?
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Heart
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Lungs
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Pancreas
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Both 1and 2
Explanation
Both 1 and 2
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