EASY
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Intercostal muscle is of (two/three) types.

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Important Questions on Breathing and Exchange of Gases

EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
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>Mechanism of Breathing
Write the steps of expiration steps in human being.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Which of the following is not the function of conducting part of respiratory system?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Draw a labelled diagram of the mechanism of inspiration and expiration.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
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>Mechanism of Breathing

Match the following respiratory capacities and respiratory volumes of a normal human adult?

Respiratory capacities Respiratory volumes
i) Residual volume a)  2800 mL
ii) Vital capacity b)  3000 mL
iii) Inspiratory reserve volume c)  1100 mL
iv) Inspiratory capacity d)  4000 mL

 

MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Explain the mechanism of inspiration and expiration.
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Inspiratory reserve volume (IRV) is normally between _____.
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Which is the correct sequence of the air passage in man?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing

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>Mechanism of Breathing
The lungs are spongy and elastic due to _______.
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
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?
HARD
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
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>Mechanism of Breathing

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>Mechanism of Breathing
If you exhale multiple times into a conical flask containing lime water through a single inlet fixed through a stop cork, lime water will?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same
EASY
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Define vital capacity. What is its significance?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
The volume of air that will remain in the lungs after a normal expiration is called
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place?
MEDIUM
Biology>Human Physiology>Breathing and Exchange of Gases>Mechanism of Breathing
The movement of the ribs is controlled by a group of muscles known as _____ muscles. (Cardiac/Intercostal)