Dead space is the portion of the respiratory system that: select one: a.. must be filled with air before gas exchange can take place. b. contains no alveoli and does not participate in gas exchange. c. includes the alveoli and capillaries surrounding the alveoli. d. receives oxygen but is unable to release carbon dioxide.

Option B

Explanation:

Dead space is the volume of sir in the body which is inhaled but it does not takes part in the gaseous exchange this is because it does not contains alveoli.

Not all the air that is inhaled inside the body is used in the process of respiration.

The dead space in the lungs is the region which helps in conducting airways, the air is not perfused to the alveoli.

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the answer is 0.42 is that is an option. this question provides no info