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21 Cards in this Set
- Front
- Back
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Which of the following is NOT true?
A) Surfactant raises alveolar surface tension B) The respiratory membrane is the site of gas exchange between the alveoli and the lungs C) The left lung has 2 lobes and 1 fissure D) The apex of the lung is just deep to the clavicle E) The superior surface of the diaphragm is covered by the parietal pleura |
A) Surfactant raises alveolar surface tension
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Which of the following would occur if you tried to blow out 100 candles at once?
A) Contraction of the diaphragm B) Contraction of the sternocleidomastoids, pectoralis minor and serratus anterior C) Contraction of the internal intercostals and the abdominal muscles |
C) Contraction of the internal intercostals and the abdominal muscles
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Which of the following would cause an increase in airway resistance?
A) Increased parasympathetic nervous activity B) Increased sympathetic nervous activity |
A) Increased parasympathetic nervous activity
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In which of these sequences does partial pressure of oxygen progressively decrease?
A) Arterial blood – Alveolar air – Body tissues B) Body tissues – Arterial blood – Alveolar air C) Body tissues – Alveolar air – Arterial blood D) Alveolar air – Arterial blood – Body tissues E) Arterial blood – Body tissues – Alveolar air |
D) Alveolar air – Arterial blood – Body tissues
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Air moves OUT of the lungs because
A) The gas pressure in the lungs is less than outside pressure B) The volume of the lungs decreases with expiration C) Contraction of the diaphragm increases the volume of the pleural cavity |
B) The volume of the lungs decreases with expiration
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True/False: According to Dalton’s Law the total pressure of a gas mixture is equal to the sum of the individual gas pressures call the partial pressures
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True
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Which of the following is NOT part of the pathway that must be crossed by oxygen on its way to binding with hemoglobin?
A) Alveolar epithelial cell B) Basement membrane C) Alveolar mucosal barrier D) Endothelial cell E) Red blood cell membrane |
C) Alveolar mucosal barrier
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Which of the following will cause a shift in the oxygen-hemoglobin saturation curve to the right?
A) Increase in temperature only B) Increase in plasma pH only C) Increase in BPG only D) Both an increase in temperature and an increase in BPG E) Both an increase in temperature and an increase in plasma pH |
D) Both an increase in temperature and an increase in BPG
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True/False: Surface Tension in the alveoli is caused by the build up of surfactants and can result in breathing difficulties for premature newborns.
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False
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True/False: Bronchodilation is controlled by the PNS and results in a reduction in resistance
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False
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True/False: Alveolar air has higher PCO2 than atmospheric air.
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True
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During exhalation:
A) Intrapulmonary pressure = atmospheric pressure B) Intrapulmonary pressure > atmospheric pressure C) Intrapulmonary pressure < atmospheric pressure |
B) Intrapulmonary pressure > atmospheric pressure
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True/False: According to Boyle’s Law, if you increase the volume of a given quantity of gas, its pressure increases.
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False
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True/False: If (on average) 3 of the 4 heme groups of the hemoglobin molecules in the blood were unbound, the Hemoglobin Saturation would be 75%.
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False
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Nerve impulses from the _____ will result in quiet breathing inhalation
A) Dorsal respiratory group (DRG) B) Ventral respiratory group (VRG) C) Cerbral Cortex D) Chemoreceptor center |
B) Ventral respiratory group (VRG)
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True/False: At a given PO2 and pH, hemoglobin carries less O2 at warmer temperatures than at colder temperatures.
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True
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The chloride shift occurs when:
A) hydrogen ions leave the red blood cells. B) hydrogen ions enter the red blood cells. C) bicarbonate ions enter the red blood cells. D) bicarbonate ions leave the red blood cells. E) carbonic acid is formed |
D) bicarbonate ions leave the red blood cells.
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Most of the CO2 that diffuses from the blood into an alveolus comes from:
A) Dissolved gas B) Carbaminohemoglobin C) Carboxyhemoglobin D) Carbonic acid/bicarbonate E) Expired air |
D) Carbonic acid/bicarbonate
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True/False: During forced exhalation/inhalation the most important respiratory muscles are the diaphragm and external intercostal muscles.
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False
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The majority of oxygen present within the blood is___.
A) Bound to hemoglobin within the plasma B) Bound to hemoglobin within red blood cells C) Dissolved within the plasma D) In the plasma as HCO3- E) Bound to plasma proteins |
B) Bound to hemoglobin within red blood cells
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Which of the following is NOT part of the pathway that must be crossed by oxygen on its way to binding with hemoglobin?
A) Alveolar epithelial cell B) Basal laminae C) Alveolar mucosal barrier D) Endothelial cell E) Red blood cell membrane |
C) Alveolar mucosal barrier
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