Laminar flow in the acinus - low velocity and Reynolds number is low

Trachea-bronchi - turbulent flow - high velocity and high Reynolds number

decrease in the radii of the bronchioles in half, which increases their resistance by 4-fold

Airway resistance is the highest in the 3rd to 5th generation bronchi

Airway resistance decreases as lung volume increases during inspiration and vice versa during expiration

Airways are elastic so they increase diameter when Pleural pressure goes up

This is why it takes longer to exhale during passive breathing than to inhale

all of the above are correct

Inspiration is effort dependent

During expiration increase in effort produces increases in flow only during the initial quarter of the expiratory vital capacity

During expiration at low and moderate lung volumes - flow is maximal and is effort independent

all of the above are correct

When the pressure in airway is equal to pleural pressure Paw = Ppl

During Forced expiration - Upstream of EPP (toward alveoli) driving pressure, PA-P mouth - will move air out of the lungs

During Forced expiration - Downstream of EPP (toward mouth) PA -Ppl

all of the above are correct