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Terms in this set (52)
Which is NOT considered to be a primary function of the respiratory system?
Regulation of water balance.
Regulation of pH balance.
Gases transport to and from the tissues.
Protection against inhaled pathogens.
Regulation of water balance.
External pulmonary ventilation refers to the...
Movement of the air into and out of the lungs.
The actual sites of gases exchange in the lungs are...
Terminal sacs of alveoli.
Type II alveolar cells...
Secrete a chemical known as surfactant
Helps prevent the alveoli from collapsing
When the diaphragm and external intercostals muscles contract...
The gas pressure in the lungs is less than outside pressure
In quiet breathing...
Inspiration involves muscular contractions and expiration is passive
Total cross-sectional area ________ with each division of the airways
The pleural pressure is...
If a student inhales as deeply as possible and then blows the air out until he cannot exhale any more, the amount of the air that he expelled is his...
Expiratory reserve volume
Vital capacity is...
Inspiratory reserve volume plus tidal volume plus the expiratory reserve volume
The compliance of the lungs will be impaired in advanced stage of this pathological condition in the lungs.
Blood vessels cover approximately ___________ % of the alveolar surface.
Histamine's primary role in the respiratory system is...
Which part of the lungs is more perfused with blood (get more blood)?
The part of the lungs that is more ventilated
The base of the lungs
The volume of the air in the anatomic dead space is...
Damage to the type II cells of the lungs would contribute to...
Increased surface tension in the water lining of alveoli
The respiratory rate times the tidal volume corrected for dead space is the...
Cessation of breathing.
Increased respiratory rate and /or volume due to increased metabolism
What makes the lungs kept all the times expanded in the chest cavity?
By the subatmospheric pressure in pleural cavity.
Which is not function of the upper respiratory organs?
Filter the air.
Moister the air.
Warm/cool down the air.
Purify the air.
Absorb the oxygen.
Absorb the oxygen
The pulmonary blood circulation and the systemic blood circulation have in common measure wise...
The volume of the blood that circulates in system
Which part of respiratory tract we encounter the highest resistance for the passage of the air?
The upper respiratory tract includes all except..
Air moves into the lungs because...
The gas pressure of oxygen in the lungs is less than outside pressure.
Which part of pulmonary tract comes between the Larynx and the bronchi?
How many times the total cross-section of the bronchioles is wider than the trachea?
200,000 or 2X 100.000
The ability of a lung to recoil or recover from stretch is called.
Julia is breathing 14 times per minute, with a tidal volume of 520mL and a dead space volume of 152mL, Lyle is breathing 15 times per minute, with a tidal volume of 400mL and a dead space of 175mL. Which patient has better alveolar ventilation?
Of the factors that influence diffusion of respiratory gases, the most variable and, therefore, important factor to consider is the...
High carbon dioxide concentration in the blood is called...
The lung pathology most likely to result from cardiac failure is...
The partial pressure of oxygen (Po2) in the pulmonary arteries is...mm Hg
The partial pressure of the carbon dioxide in the pulmonary arteries is....mm Hg
Hypoxia resulting from the accumulation of fluid in the in the interstitial space between the alveoli and the capillaries is called...
Hypoxia caused by hypoventilation due to the narrowing of the airways tract and impairs the expiration of the air from the lungs is called.
Most of the oxygen is transported in the blood as...
Bounded to the hemoglobin
In the medulla oblongata, the nucleus tractus solitarius contains the __________ of neurons.
dorsal respiratory group
An increase in the level of carbon dioxide in the blood will...
increase the rate of breathing.
Protective reflexes of the lungs include..
sneezing and caughing
The peripheral sensors or chemoreceptors ( bodies) are located...
The chloride shift occurs when...
bicarbonate ions leave the red blood cells.
The carbon dioxide is transported in blood in three ways. Which one percent wise is the highest (predominant).
As bicarbonate ions and hydrogen ions
The carbonic anhydrase will help in this reaction...
binding the CO2 to water to produce hydrogen ions and bicarbonate ions.
reverse the hydrogen ions ad bicarbonate ions to produce CO2 and water.
Which gas diffuses faster and easly in the liquid like water?
Carbon dioxide. (x20)
Ventral respiratory group (VRG) contains a center that regulate spontaneous firing neurons that may act as a basic pacemaker.
The common passageway shared by the respiratory and digestive systems is the
Most of the carbon dioxide in the blood is transported as
Which gas diffuses slower?
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