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WorksheetsRespiratory physiology
Total questions: 10
Worksheet time: 10mins
The normal FRV1/FVC ratio is
0.95
0.80
0.60
0.50
0.40
The functional residual capacity is composed of the
Expiratory reserve volume and residual volume
Inspiratory capacity and vital capacity
Expiratory reserve volume and tidal volume
Inspiratory reserve volume and residual volume
Expiratory capacity and tidal volume
Which of the following statements correctly defines the relationship between minute ventilation (VE), dead space ventilation (VD), and PaCO2?
If VE is constant and VD increases, then PaCO2 will increase.
If VE is constant and VD increases, then PaCO2 will decrease.
If VD is constant and VE increases, then PaCO2 will increase.
If VD is constant and VE increases, then PaCO2 will decrease.
None of the above
The predominant stimulus for activation of hypoxic pulmonary vasoconstriction is
Increased PaCO2
Increased PaO2
Decreased PaCO2
Decreased PAO2
None of the above
The P50 for normal adult hemoglobin is
15
35
50
45
25
During a normal Vt (500 mL) breath, the transpulmonary pressure increases from 0 to 5 cm H2O). The product of transpulmonary pressure and Vt is 2,500 cmH2O-ml. This expression of the pressure-volume relationship during breathing determines what variable of respiratory mechanics?
Lung compliance
Airway resistance
Pulmonary elastance
Work of breathing
Closing capacity
The most important mechanism for the transport of CO2 from peripheral tissues to the lungs is
CO2 dissolved in plasma
Carbonic acid
Carbaminohemogiobin
HC03-
(CO3)-2
Which of the following muscles or muscle groups of respiration is not used for inspiration?
Diaphragm
Internal intercostal muscles
External intercostal muscles
Scalene muscles
Sternomastoids
The anatomic dead space in a 70-kg male is
50 mL
150 mL
250 ml
500 ml
750 ml
Reynold's number is an important factor in the determination of
O2 transport
Surface tension
Turbulent vs. laminar flow
Physiologic dead-space ventilation
Functional residual capacity
