EASY
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Which is a common passage in swallowing food and breathing?

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Important Questions on Breathing and Exchange of Gases

MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Human fetal hemoglobin differs from the adult hemoglobin in that it has:
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The lungs are spongy and elastic due to _______.
MEDIUM
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.

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

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

EASY
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
Which of the following factors are favourable for the formation of oxyhaemoglobin in the alveoli human lungs?
MEDIUM
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
The process in which atmospheric air with 21% of O2 is drawn in and alveolar air rich in CO2 is sent out is called        
EASY
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:
EASY
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?
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The maximum number of oxygen molecules that can bind to one molecule of hemoglobin is:
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The unpaired cartilages supporting the wall of larynx are      
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Cavity lodging lungs is _______
EASY
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

EASY
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
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which is the correct sequence of the air passage in man?
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
In jelly fishes, majority of gaseous exchange takes place through the ______.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which of the following shows pulmonary respiration?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The pseudostratified columnar epithelium is found in
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The figure given below shows a small part of human lung where exchange of gas takes place. In which one of the options given below, the one part A, B, C or D is correctly identified along with its function.

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