If a blood clot lodged in a pulmonary arteriole, what would you expect to happen
ID: 15587 • Letter: I
Question
If a blood clot lodged in a pulmonary arteriole, what would you expect to happen to the value of theventilation-perfusion ratio within this lobe?
A. it would be greater than normal
B. it would be less than normal
C. it would not change
Which of the following would be expected to increase airway resistance?
A. Stimulation of parasympathetic nerves to the lungs
B. Increased mucus production
C. Release of histamine by mast cells
D. Forced expirations
E. All of the above
24. Hypoxic pulmonary vasoconstriction (HPV)
A. decreases blood flow to underventilated alveoli
B. is caused by low alveolar oxygen levels (low PO2)
C. occurs only at high altitude
D. A and B
E. A, B, and C
Explanation / Answer
If a blood clot lodged in a pulmonary arteriole, what would you expect to happen to the value of the
ventilation-perfusion ratio within this lobe?
A. it would be greater than normal
B. it would be less than normal
C. it would not change
Which of the following would be expected to increase airway resistance?
A. Stimulation of parasympathetic nerves to the lungs
B. Increased mucus production
C. Release of histamine by mast cells
D. Forced expirations
E. All of the above
24. Hypoxic pulmonary vasoconstriction (HPV)
A. decreases blood flow to underventilated alveoli
B. is caused by low alveolar oxygen levels (low PO2)
C. occurs only at high altitude
D. A and B
E. A, B, and C
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