EASY
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What are the two types of intercostal muscles?

Important Questions on Respiration and Circulation

EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
A person suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Write the steps of expiration steps in human being.
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Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which of the following is not the function of conducting part of respiratory system?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Draw a labelled diagram of the mechanism of inspiration and expiration.
MEDIUM
Biology>Physiology>Respiration and Circulation>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?
EASY
Biology>Physiology>Respiration and Circulation>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>Physiology>Respiration and Circulation>Mechanism of Breathing
Explain the mechanism of inspiration and expiration.
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Inspiratory reserve volume (IRV) is normally between _____.
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which is the correct sequence of the air passage in man?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing

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

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

HARD
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
When does the increase in the volume of thoracic chamber take place in the dorsoventral axis? 
EASY
Biology>Physiology>Respiration and Circulation>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

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Biology>Physiology>Respiration and Circulation>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>Physiology>Respiration and Circulation>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?
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
Which one of the following is not a character of respiratory surface?
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
What is partial pressure? How does it help in gaseous exchange during respiration?
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
The figure given below shows a small part of human lung where exchange of gases 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?

​Question Image
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Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
The pathway of inhaled air:
MEDIUM
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
In mature mammalian erythrocytes, the respiration is:
EASY
Biology>Physiology>Respiration and Circulation>Mechanism of Breathing
How does the exchange of respiratory gases take place in the alveoli or lungs?