Part 2 Flashcards

(14 cards)

1
Q

What is between the visceral and parietal pleura that keeps the lung inflated against the chest wall?

A

Negative Pressure

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2
Q

Negative pressure varies between?

A

-5 and -7.5 cm H20

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3
Q

Alveolar pressure is sub atmospheric during?

A

Inspiration

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4
Q

Alveolar pressure is supra-atmospheric during?

A

Expiration

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5
Q

The difference between alveolar pressure and pleural pressure is?

A

Transpulmonary Pressure

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6
Q

What does transpulmonary pressure measure?

A

Recoil tendency of lungs

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7
Q

Transpulmonary pressure peaks at the end of?

A

Inspiration

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8
Q

Change in volume divided by change in pressure is equal to?

A

Compliance of the lung

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9
Q

At the onset of inspiration the pleural pressure changes at a faster rate than lung volume. This is known as?

A

Hysteresis

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10
Q

It’s easier to inflate a saline filled lung than an air filled lung because?

A

Surface tension forces have been eliminated in the saline filled lung.

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11
Q

The effect of the thoracic cage on the lung reduces compliance by about 1/2 around?

A

Functional Residual Capacity (at the end of normal inspiration)

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12
Q

Compliance is greater reduced at?

A

High or Low Lung Volumes

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13
Q

When we take a breath in what happens?

A

Airway resistance increases

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14
Q

The greatest resistance to airflow is through the?

A

Nasal Passages

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