DR. JONES LUNGS PROPERTIES AND MECHANICS

Which of the following tries to pull the chest wall outward and also creates an inward pull?

• visceral pleura

• elastic recoil

• intrapleural space

• pleural membranes

Which of the following applies when the lungs are at rest? Select all that apply

• Lung tissue is very elastic and wants to be small

• The chest wall wants to pull out

• Lung tissue isn't very elastic

gas pressure in the alveoli

• Palv

• Patm

gas pressure at the nose and mouth

• Patm

• Palv

Which of the following is TRUE about Quiet Breathing?

• muscle in diaphragm contracts and chest wall, spatial lung volume increase (Boyles Law)

• muscle in diaphragm relax and chest wall, spatial lung volume increase (Boyles Law)

Requires lungs have a sub atmospheric pressure for air to move from atmosphere into lungs.

• Inspiration

• Expiration

Requires lungs have a greater than atmospheric pressure for air to move from the lungs into the atmosphere.

• Inspiration

• Expiration

Which of the following are the key events when we Inhale? Select all that apply

• Expand  chest and PIP becomes more negative

• Volume in alveoli increase

• Pressure in alveoli drops

• Air flows into alveoli and fills lungs

• Pressures equalize and air flow stops

Which of the following are the key events when we Exhale? Select all that apply

• Compress chest PIP becomes less negative

• Volume in alveoli decreases

• Pressure in alveoli increases

• Air flows out

• Pressures equalize and air flow stops

Memorize this!

• Yes

• No