Mrv =
a. tidal volume x breaths per minute
b. the total amount of exchangeable air
c. the function residual capacity
d. air inspired after a tidal inhalation, not including tidal volume

Option (a).

Explanation:

Minute respiratory volume or minute ventilation may be defined as the amount of gas exhaled or inhaled in a minute. Wright respirometer can be used to calculate the minute ventilation.

Minute ventilation can be calculated by the formula:

MRV = TV × Breaths per minute.

Here, MRV is minute respiratory volume and TV is tidal volume.

Thus, the correct answer is option (a).

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