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Define pleura - correct answer Tissue lining the lungs and rib cage
Where is the visceral pleura located? - correct answer Connected to the lungs
Where is the parietal pleura located? - correct answer Connected to the rib cage
What determines airway resistance? - correct answer The diameter of the conducting zones
A 1 mm change in airway diameter due to edema leaves what percentage patent in adults vs
neonates? - correct answer 81% adults
44% in neonates- cause more difficulty in breathing during a respiratory infection & more
symptomatic
What is the purpose of the diaphragm? - correct answer Adjust size of the chest cavity
What direction does the lungs move during a diaphragmatic contraction? - correct answer Lungs
pulled down during inhalation
What moves the lungs up during exhalation? - correct answer Relaxation/ elastic recoil moves
lungs up during exhalation
,What muscles are used during a forced exhalation? - correct answer Abdominal muscles assist
with pushing lungs up
What is the purpose of intercostal muscles? - correct answer Move chest cavity in and out
What is the purpose of external intercostal muscles? - correct answer Raise and expand the rib
cage with help of sternocleidomastoid muscles on inhalation
What caused the lungs to move with the rib cage? - correct answer Pleural fluid and negative
pressure
What fills the pleural space between the visceral pleura and the parietal pleura? - correct
answer Pleural fluid
What is the function of internal intercostals and abdominal recto muscles? - correct answer
Pulls the rib cage down and in during exhalation
Define lung compliance - correct answer Degree lungs expand per unit of change in
transpulmonary pressure
What determines lung compliance? - correct answer 1. Elastic forces in lung tissue
2. Elastic forces of pleural tension in alveoli and lung interstitum
What causes alveolar surface tension? - correct answer 1. Small amounts of fluid lining the
alveoli- water molecules of alveolar fluid are attracted to water molecules in the air= contractile
force
2. Air-fluid interfaces creates a force that causes alveoli to collapse inward = surface tension
elastic force
, 3. Surfactant reduces the surface tension and disrupts the water molecules
What does a "normal" compliance curve represent? - correct answer The amount of pressure it
takes to allow a certain volume of air in the lungs
What does an "increased resistance " compliance curve represent? - correct answer It requires
greater pressure to allow air into the lungs due to increases resistance.
Found in disease processes like Asthma and COPD
What type of compliance curve is found in patients diagnosed with Asthma or COPD? - correct
answer Increased resistance
What does a" decreased" compliance curve represent? - correct answer Decrease volume
/amount of air in the lungs that required a higher amount of pressure to allow air into the lungs
Diseases: Pneumonia
What respiratory disease process would have a decreased compliance curve? - correct answer
Pneumonia
Describe the mature rib cage as related to compliance. - correct answer It is more rigid requiring
greater muscular effort to expand the thorax and the chest wall has limited recoil
What is the difference in an adult's rib cage and a child's rib cage? - correct answer Childs rib
cage is cartilaginous ribs, the chest wall is less rigid, it's easier to expand but has a strong recoil
and more potential for collapse during exhalation