One inhalation and one expiration is COUNTED as a single respiration (Option B).
In human physiology, respiration refers to the exchange of oxygen and carbon dioxide with the environment through the respiratory system (e.g., lungs, tracheas, etc).
Inhalation is the process by which oxygen-rich air enters the lungs and oxygen moves from the lungs to the bloodstream.
Expiration refers to the opposite process by which carbon dioxide is removed from the body through the respiratory system.
In conclusion, one inhalation and one expiration is COUNTED as a single respiration (Option B).
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