Why must a person floating on the surface of the water and breathing through a snorkel increase tidal volume and/or breathing rate to maintain normal alveolar ventilation?
a. The lumen of the snorkel introduces additional dead space, adding to the residual volume of the airways.
b. Breathing through the mouth introduces more airway resistance than breathing through the nostrils.
c. Breathing through a snorkel decreases the total resistance of the airways to air flow.
d. Water pressure compresses the chest cavity, making breathing more difficult.
I think it is d. Please help.
2007-03-09
10:46:18
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3 answers
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asked by
Anonymous
in
Science & Mathematics
➔ Biology