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RESPIRATORY EXAM Q&A
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RESPIRATORY EXAM Q&A
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RESPIRATORY EXAM Q&ARogers was asked to play the role of Thor in all Marvel movies after Avengers: End
Game. He got so excited that he began to hyperventilate. To slow down his rate of
respiration, which of the following should occur?
A. The DRG will send more impulses to the inspiratory muscles thus slowing down
respiration.
B. The VRG will send fewer impulses to the inspiratory muscles thus slowing down
respiration.
C. His scalenes and sternocleidomastoid would need to contract. - Answer-The VRG
will send fewer impulses to the inspiratory muscles thus slowing down respiration.
Which of the following is true regarding breathing during an acute asthma attack?
A. Breathing becomes difficult due to a rapid decline in lung compliance.
B. Breathing becomes more difficult due to dramatic spasms of bronchiolar smooth
muscle.
C. Breathing becomes difficult due to a lack of communication from the CNS. - Answer-
Breathing becomes more difficult due to dramatic spasms of bronchiolar smooth
muscle.
The respiratory membrane is a combination of ________.
A. respiratory bronchioles and alveolar sacs
B. respiratory bronchioles and alveolar ducts
C. alveolar and capillary walls and their fused basement membranes
D. atria and alveolar sacs - Answer-alveolar and capillary walls and their fused
basement membranes
The lungs are perfused by two circulations: the pulmonary and the bronchial. The
pulmonary circulation is for oxygenation of blood. The bronchial circulation supplies
blood to the lung structures (tissue).
T/F - Answer-T
Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes
by ________.
A. diffusion
B. active transport
C. filtration
D. osmosis - Answer-A. diffusion
Which of the following correctly describes mechanisms of CO2 transport?
A. as bicarbonate ion in plasma
B. 7—10% of CO2 is dissolved directly into the plasma
C. 20% of CO2 is carried in the form of carbaminohemoglobin
D. All of the above - Answer-All of the above
, Which of the choices below is not a factor that promotes oxygen binding to and
dissociation from hemoglobin?
A. partial pressure of oxygen
B. partial pressure of carbon dioxide
C. temperature
D. number of red blood cells - Answer-D. number of red blood cells
A restrictive lung disease usually reduces volumes and capacities rather than affecting
airflow.
T/F - Answer-F
The largest amount of carbon dioxide is transported in the bloodstream in the form of
carbonic anhydrase. T/F - Answer-F
Increased temperature results in decreased O2 unloading from hemoglobin. T/F -
Answer-F
The single most important stimulus that regulates respiration is PCO2 changes. t/f -
Answer-t
The scalenes and sternocleidomastoids are accessory muscles for deep exhalation. T/F
- Answer-F
Tracheal obstruction is life threatening. T/F - Answer-T
Atelectasis (lung collapse) renders the lung useless for ventilation. T/F - Answer-T
The Hering-Breuer reflex is a potentially dangerous response that may cause
overinflation of the lung. T/F - Answer-F
The VRG sends impulses to the inspiratory muscles for 3 seconds, and then nothing for
2 seconds. T/F - Answer-F
Impulses from the vagus nerve will influence the action of the diaphragm. T/F - Answer-
F
Surfactant helps to prevent the alveoli from collapsing by ________.
A. warming the air before it enters
B. reducing the surface tension of alveolar fluid
C. protecting the surface of alveoli from dehydration and other environmental variations
D. humidifying the air before it enters - Answer-B. reducing the surface tension of
alveolar fluid
With the Bohr effect, more oxygen is released because a(n) ________.
A. decrease in pH (acidosis) strengthens the hemoglobin-oxygen bond
B. increase in pH (alkalosis) weakens the hemoglobin-oxygen bond
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