What event is characteristic of the function in Zone 1 of the lung?
A) Blood flow through the pulmonary capillary bed increases in regular increments.
B) Alveolar pressure is greater than venous pressure but not greater than arterial pressure.
C) The capillary bed collapses, and normal blood flow ceases.
D) Blood flows through Zone 1, but it is impeded to a certain extent by alveolar pressure.
Correct Answer:
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