NU 327 EXAM 3 Questions with Detailed Verified Answers

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NU 327 EXAM 3 Questions with
Detailed Verified Answers

Question: What is the primary function of the lungs?


Ans: gas exchange


Question: ________ is transported to the body tissues.


Ans: Oxygen


Question: __________ a waste product, is transported out of the body


Ans: Carbon dioxide


Question: The exchange of these gases (oxygen and carbon dioxide) take
place where?


Ans: alveolar-capillary membrane


Question: upper airway structures include


Ans: nasopharynx, oropharynx, laryngopharynx


Question: lower airway structures include

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Ans: larynx, trachea, bronchi, bronchipulmonary segments, bronchioles,
terminal bronchioles, acinus


Question: nasal cavity


Ans: conducts gases to and from the lungs, and filters, warms, and humidifies
the air. rigid box composed of two-thirds cartilage and one-third bone, which
prevents collapse during movement of air.


Question: vibrissae


Ans: large hairs of the nasal cavity


Question: cilia


Ans: sweep foreign particles trapped by mucus into the nasopharynx, where
they are swallowed or expectorated. They line the trachea and bronchi,
defense against "invaders" and produce cough reflex.


Question: How is ciliary function impaired?


Ans: smoking, alcohol ingestion, hypothermia, hyperthermia, cold air, low
humidity, starvation, anesthetics, corticosteroids, noxious gases, the common
cold, and increased mucus production


Question: larynx

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Ans: the transition area between the upper and lower airways. contains
epiglottis, vocal chords and cartilages.


Question: 300 million


Ans: Adult lungs contain how many alveoli?


Question: alveoli


Ans: grapelike clusters of air filled sacs that are responsible for gas exchange


Question: Type II


Ans: alveolar cell that produces surfactant


Question: Type I


Ans: alveolar cell that lowers surface tension and facilitates gas exchange


Question: Right lung


Ans: consists of upper, middle, and lower lobes


Question: Left lung


Ans: consists of upper and lower lobes


Question: bronchial artery system

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Ans: supplies a small amount of oxygenated blood to the pleura and lung
tissues


Question: pulmonary artery system


Ans: provides a vast capillary network for O2 and CO2 exchange. Pulmonary
artery trunk leaves RV with unoxygenated blood


Pulmonary vein carries oxygenated blood back to heart


Question: T


Ans: T/F Filtration of fluid through pulmonary capillaries is influenced by
hydrostatic pressure and colloid osmotic pressure in the same way as other
capillaries


Question: T


Ans: T/F Excessive filtration can lead to pulmonary edema, which interferes
with normal gas exchange.


Question: Ventilation


Ans: the process of moving air into the lungs and distributing air within the
lungs to gas exchange units (alveoli) for maintenance of oxygenation and
removal of carbon dioxide (CO2)


Question: Where is the neural control of the respiratory system located?