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NSG 532 Exam 3 |Questions with 100% correct answers
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NSG 532 Exam 3 |Questions with 100% correctanswers
Describe the anatomy of the respiratory zone in the respiratory system - ✔️✔️Respiratory
bronchioles
Alveolar ducts
Alveoli
Describe respiration in the conducting zone - ✔️✔️Air passes in and out of the lungs, but NO
O2/CO2 exchange occurs
Air is humidified, warmed, and filtered
Mucus traps particles, cilia carries them away
Describe respiration in the respiration zone - ✔️✔️Actual site of O2/CO2 exchange w/blood
What percentage of O2/CO2 exchange are the respiratory bronchioles and alveolar ducts
responsible for?
Alveolar sacs? - ✔️✔️Bronchioles/alveolar ducts -- 10% of gas exchange
Alveolar sacs--90% of gas exchange
Describe Type II pneumocytes - ✔️✔️Make up about 5% of the alveolar surface and air/blood
barrier
, Responsible for secretion of surfactant
Can act as stem cells to differentiate into Type I pneumocytes
Function as H2O and Na reabsorption
Describe Type I pneumocytes - ✔️✔️Make up about 90-95% of alveolar surface and form
air/blood barrier
Responsible for O2/CO2 exchange between alveoli and blood
UNABLE to proliferate
Describe the function of dust cells - ✔️✔️Phagocytes that remove debris and
pathogens/microbes
Describe the function of fibroblasts - ✔️✔️Begins cellular portion of alveoli, part of connective
tissue
Produce extracellular matrix components -- elastic collagen
Describe collagen and elastic fibers - ✔️✔️Collagen fibers ---- stretch resistant, important for
resisting extra elastic forces
Elastic fibers----highly flexible for stretching and recoiling, allow the alveoli to stretch during
inhalation and spring back during exhalation
Describe the functional anatomy of the pleural sac - ✔️✔️Parietal Layer --- Attached to the chest
wall
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