Flashcards in Unit 4 Deck (42)
What are the muscles of inspiration?
Muscles of expiration are only needed when? And what are they?
Only needed for forceful expiration
Rectus abdominus, obliques, internal intercostals
______ is due to muscle contraction which increases thoracic cage size
How do lungs inflate?
The compliant lungs inflate due to the negative pressure in the pleural cavity
_______ is due to decreasing thoracic cage size bc of the elasticity of the thoracic soft tissue and the lungs themselves
___________ pressure oscillates around sero relative to atmospheric pressure
When negative, air ______ lungs. When positive, air _____ lungs
The lowest intrapulmonary pressure is reached ______ into inspiration
After the lowest intrapulmonary pressure is reached halfway into inspiration, entering the lungs _______ the pressure
The highest intrapulmonary pressure is reached __________
Halfway into expiration
_________ is always negative compared to atmospheric pressure, oscillating around -4
Intrapleural pressure (pleural pressure)
_________ exerts an expanding effect on the lungs due to lung compliance
______ is the difference between intrapulmonary pressure and intrapleural pressure
Alveoli contain two type of pneumocytes:
Type 1: _________
Type 2: _______
Type 1 line the alveolar walls (squamous)
Type 2: secrete pulmonary surfactant
________ is necessary to keep alveoli inflated
Premature babies lack _______ and therefor develop respiratory distress syndrome
_______ is a commonly used pulmoary function test
______ is normal quiet breathing. Volume of air you breathe in and out
__________ i from top of tidal volume, breathing in until you cannot get anymore
Inspiratory reserve volume
________ starts from a normal breath out then try to squeeze every last bit of air out
Expiratory reserve volume
____________ the last bit of air that is in your lungs that is always present
_________ are the same of more than one pulmonary volume
What is inspiratory capacity?
Tidal volume + inspiratory reserve volume
What is functional residual capacity
Expiratory reserve volume + residual volume
How would one calculate vital capacity?
Inspiratory capacity + expiratory reserve volume OR
Tidal volume + inspiratory reserve volume + expiratory reserve volume
Minute respiratory volume = _______ X ______
Tidal volume X respiratory rate
________ sonsits of air that fill the respiratory passageways tha are not capable of gas exchange with blood
Dead air space
Anatomic dead are space is?
Air in trachea, terminal bronchioles
Alveolar dead space is ______
Damaged or under perfumed alveoli