If the bronchioles are dilated the anatomic dead space and tidal volume will

Dead space usually increases with tidal volume.

Dead space is the known to be portion of each tidal volume which does not get involved in gas exchange.The two different ways to define dead space were: anatomical and physiological.Physiological dead space is the non-respiratory parts of the bronchial tree while anatomical dead space is known to be total volume of the conducting airways from the mouth or nose down to bronchioles . However, the dead space usually increases with tidal volume.

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