NUR 195 Test 1; Questions and Answers %
Correct
What is assessed when ABG's are measured? Correct answer-bicarbonate-carbonic acid
buffer system (extracellular buffer system)
Respirations requires concert of which three things? Correct answer--Ventilation:
Movement of air from the atmospher...
NUR 195 Test 1; Questions and Answers %
Correct
What is assessed when ABG's are measured? Correct answer-bicarbonate-carbonic acid
buffer system (extracellular buffer system)
Respirations requires concert of which three things? Correct answer--Ventilation:
Movement of air from the atmosphere to the alveoli [the functional unit of the lung]
-Diffusion: Exchange of oxygen [O2] and carbon dioxide [CO2] at the alveolar-capillary
membrane
-Perfusion: Blood flow
The larynx consists of: Correct answer-Epiglottis: A valve flap of cartilage (lid-like
structure) that covers the entrance to the larynx during swallowing; it is essential to prevent
aspiration (inhalation of food or fluid into the lungs)
Glottis: The opening between the vocal cords in the larynx
Thyroid cartilage: The largest of the cartilage structures; it can be felt anteriorly as the "Adam's
apple"
Vocal cords: Ligaments controlled by muscular movements that produce sounds; located in the
lumen of the larynx
Stimulus for surfactant production is thought to be related to maximum deep ________
sustained for a few seconds or sighing, in which a person's normal tidal volume (normal breath
of approximately 500 mL) is _________ one to three times what is normal. Correct
answer-inspiration, increased
, NUR 195 Test 1; Questions and Answers %
Correct
With ___________, the diaphragm and intercostals recoil, which increases the _____________
______________ over ____________ ___________ so that ______ are expelled from the lung.
Correct answer-expiration, intrapulmonary pressure, atmospheric pressure, gases
External respiration requires three processes: Correct answer-(1) ventilation, the act of
breathing (inspiration and expiration)
(2) perfusion, blood flow to the alveoli, so that gases can be exchanged
(3) diffusion, movement of gases from a higher area of concentration to a lower area across the
alveolar-capillary membrane.
If the patient's FEV1 and forced vital capacity are reduced proportionately: Correct
answer-maximal lung expansion is restricted in some way.
Diffusion Correct answer-is the process by which O2 and CO2 are exchanged at the air-
blood interface.
A silent unit Correct answer-(a combination of shunting and dead-space ventilation)
occurs when little or no ventilation and perfusion are present, such as in acute respiratory
distress syndrome.
The silent unit indicates an absence of ventilation and perfusion to the lung area.
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