EASY
Earn 100

Describe the human respiratory system with a labelled diagram.

Important Questions on Breathing and Exchange of Gases

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
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Write the steps of expiration steps in human being.
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
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        
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The unpaired cartilages supporting the wall of larynx are      
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Explain the mechanism of inspiration and expiration.
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
Which is the correct sequence of the air passage in man?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Assertion (A): Biconcave shape of mammalian RBC facilitates gas exchange.

Reason (R): Biconcave shape provides a high surface to volume ratio.

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:
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The atmospheric pressure is 760 mm Hg at the sea level. Which of the following ranges is nearest to the partial pressure of CO2 in mm Hg?
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The lungs are spongy and elastic due to _______.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
In jelly fishes, majority of gaseous exchange takes place through the ______.
HARD
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
When does the increase in the volume of thoracic chamber take place in the dorsoventral axis? 
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
If you exhale multiple times into a conical flask containing lime water through a single inlet fixed through a stop cork, lime water will?
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Define pulmonary respiration.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Lungs comprise of
HARD
Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Explain the structure of lungs.