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External respiration occurs in the ____________ and internal respiration occurs in the _________________.

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Important Questions on Breathing and Exchange of Gases

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Write the steps of expiration steps in human being.
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Gaseous exchange of oxygen and carbon dioxide between alveolar air and capillaries takes place by:
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When does the increase in the volume of thoracic chamber take place in the dorsoventral axis? 
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A person suddenly starts coughing while swallowing food. This coughing would have been due to improper movement of
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Compared to the atmosphere air, the alveolar air has:
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Which of the following is not the function of conducting part of respiratory system?
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Which is the correct sequence of the air passage in man?
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Identify the wrong statement with reference to transport of oxygen.
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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?
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Assertion (A): Biconcave shape of mammalian RBC facilitates gas exchange.

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

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Reduction in pH of blood will:
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The partial pressures (in mmHg) of oxygen O2 and carbon dioxide CO2 at alveoli (the site of diffusion) are:
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The partial pressure of oxygen in the alveoli of the lungs is:
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Explain the mechanism of inspiration and expiration.
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Approximately seventy percent of carbon-dioxide absorbed by the blood will be transported to the lungs:
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Study the following statements and pick up the correct one:
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The element whose percentage weight is highest in both earth's crust and human body is
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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>Exchange of Gases
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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If you exhale multiple times into a conical flask containing lime water through a single inlet fixed through a stop cork, lime water will?