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What is the shape of the diaphragm while taking air?

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Important Questions on Breathing and Exchange of Gases

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Match the type of cells in Column I with the organs they are part of, listed in Column II:

  Column I   Column II
P. Chondroblast i. Bone
Q. Osteoclast ii. Brain
R. Microglia iii. Cartilage
S. Pneumocyte iv. Lung

Choose the CORRECT combination.

EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The lungs are spongy and elastic due to _______.
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Cavity lodging lungs is _______
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Match the following
  List-I   List-II
(A) Moist body wall (I) Insects
(B) Tracheal system (II) Amphibian larvae
(C) Book lungs (III) Earthworms
(D) Gills (IV) Aves
    (V) Spiders

The correct match is
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The process in which atmospheric air with 21% of O2 is drawn in and alveolar air rich in CO2 is sent out is called        
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Select the correct events that occur during inspiration.

(a) Contraction of diaphragm
(b) Contraction of external intercostal muscles
(c) Pulmonary volume decreases
(d) Intrapulmonary pressure increases

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
A person suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
If the number of alveoli in an individual is doubled without changing the total alveolar volume, the gas exchange capacity of the lungs will:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which of the following is not the function of conducting part of respiratory system?
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The unpaired cartilages supporting the wall of larynx are      
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which is the correct sequence of the air passage in man?
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
In jelly fishes, majority of gaseous exchange takes place through the ______.
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Name the organs of breathing in fish.
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
In the process of respiration, the exchange of gases takes place in
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Define pulmonary respiration.
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Explain the structure of lungs.
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The alveoli of lungs are lined by
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Lungs comprise of
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Read the following statements and identify the wrong ones among them:

(i) The oral cavity leads into a short larynx, which is a common opening for food and air.

(ii) A cartilaginous flap called “epiglottis” prevents the entry of food into the glottis.

(iii) The duct of the submaxillary gland is called the “Duct of Wirsung”.

(iv) Oesophagus leads into a J-shaped bag-like structure called “stomach”.