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What four muscles are involved with inspiration?
- External intercostals
What are two muscles utilized for forced expiration?
- Internal intercostals
- Abdominal Muscles (most important)
What is the general relation b/t intrapleural and intraalveolar pressure?
Intrapleural always slightly less
What is the relation b/t elastic tissue and compliance?
Increase elastic tissue = decreased compliance
What is hysteresis?
Describes the P-V graph where the expiration and inspiration lines form a circle but don't cross
What happens to lung compliance when volumes are high and low?
- High Volume = Low compliance
- Low Volume = high compliance
What is atelectasis?
When your alveoli collapse
How do surfactants prevent alveolar collapse?
Surfactants are FA and break up intramolecular forces
In babies, when does surfactant production begin?
Where is the site of maximum airway resistance?
Medium-sized bronchi #5-10
What will be the volume intake for a person with airway resistance?
Volume will be higher to compensate
What happens to Resistance during diving and for what reason?
- Resistance increases
- occurs b/c of increase in gas in blood which increases viscosity
What gas is used to decrease resistance?
What would you like to do?
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