If a large number of people are enclosed in a room,then

  • A
    Oxygen decreases and carbon dioxide increases
  • B
    Oxygen increases and carbon dioxide decreases
  • C
    Both oxygen and carbon dioxide decreases
  • D
    Both oxygen and carbon dioxide increases

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Similar Questions

Which of the following are the correct statements regarding respiration in humans?

Which of the following statements correctly describes the respiratory processes occurring in the lungs?

In humans, respiration occurs in the following steps. Arrange these steps in the correct order.
$A$. Diffusion of $O_2$ and $CO_2$ between blood and tissues
$B$. Diffusion of $O_2$ and $CO_2$ across alveolar membrane
$C$. Pulmonary ventilation by which atmospheric air is drawn in and $CO_2$ rich alveolar air is released out
$D$. Cellular respiration
$E$. Transport of gases by the blood

Which of the following steps is $NOT$ involved in the process of respiration?

Assertion: In mammals,a complex respiratory system has developed.
Reason: Mammalian skin is impermeable to gases.

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