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WorksheetsPrematric Quiz 2
Total questions: 20
Worksheet time: 40mins
How much volume is the anatomic dead space?
100ml
150ml
200ml
250ml
According to Fick’s law, the surface area is ________ proportional to the thickness of the membrane and __________ proportional to the difference in partial pressure across the membrane.
Directly, directly
Directly, indirectly
Indirectly, indirectly
Indirectly, directly
By the time inspired air reaches the respiratory exchange surfaces, the partial pressure of water (water vapor pressure) in this gas mixture is __________. Assume normal body temperature.
10 mmHg
47 mmHg
100 mmHg
760 mmHg
In the lungs, which of the following is NOT a barrier to gas exchange between red blood cells and the alveolar space?
A fluid layer of water and surfactant covering the luminal surface of alveolar cells
Basement membranes of endothelial and alveolar cells
Smooth muscle cells surrounding the endothelial cells
The plasma membrane of the endothelial cells
The maximum amount of air that can be expired after a maximum inspiration is:
Vital capacity
Expiratory reserve volume
Inspiratory reserve volume
Inspiratory reserve volume
How would you calculate alveolar ventilation?
Tidal Volume x Respiratory Rate
Tidal Volume/ Respiratory Rate
(Tidal Volume - Physiological Dead Space) x Respiratory Rate
(Tidal Volume + Physiological Dead Space) x Respiratory Rate
Changes in Hb affinity for CO2 based on the oxygen concentrations is known as the:
Bohr effect
Haldane effect
Cooperativity
Hysteresis
Which lung capacities cannot be measured using spirometry?
Total Lung Capacity and Residual Volume
Total Lung Capacity and Tidal Volume
Total Lung Capacity and Functional Residual Capacity
Total Lung Capacity and Inspiratory Capacity
What muscles are normally used for expiration at rest?
Diaphragm
Internal intercostal muscles
Accessory muscles
None
A rich second cousin invites you to Aruba for a week. The two of you are scuba diving to a depth of 66 ft. below sea level ( 2 atmospheres of water pressure). What is the partial pressure of oxygen in the air that you are breathing?
760 x .21 =160 mmHg
.21 x 2 x 760 = 320 mmHg
.21 x 2 x 760 = 320 x 2 = 480 mmHg
.21 x 4 x 760 = 639 x 1. = 960 mmHg
Which of the following is NOT a function of the lungs?
Metabolism
Serves as a reservoir of blood for the left ventricle
Facilitates the exchange of O2 and CO2 between air and blood
All of the above are true
Which of the following equations gives the minute ventilation?
= tidal volume x HR/SV
= (tidal volume - dead space) x breaths/min
= Tidal volume x breaths/min
= CO2 production/alveolar ventilation
The correct equation for collapsing pressure is:
P = 2T/r
P = Q/R
Vt x breaths/min
8nl/ℼr^4
When using the alveolar gas equation, the respiratory quotient is equal to the ratio of:
O2 consumed/CO2 produced
O2 produced/CO2 consumed
CO2 consumed/O2 produced
CO2 produced/O2 consumed
What is the equation used to calculate physiological dead space?
VT x (PECO2 - PaCO2)/ PaCO2
VT x (PaCO2 - PECO2)/ PaCO2
VT x (PaCO2 - PECO2)/ PECO2
VT x (PECO2 - PaCO2)/ PECO2
At functional residual capacity, the...
outward pull of the lungs is balanced by the inward pull of the chest
outward pull of the lungs exceeds the inward pull of the chest
inward pull of the lungs is balanced by the outward pull of the chest
inward pull of lungs exceeds the outward pull of the chest
When lung volume is ___ than FRC, there is a net _____ on the lung-chest wall system.
less; expanding force
less; collapsing force
more; expanding force
none of the above
According to the Law of Laplace, a ___ alveolus will have a ___ collapsing pressure
small, low
small, high
large, high
large, constant
Pulmonary Vascular Resistance can be calculated using the equation:
(Pulmonary artery pressure - LT atrium pressure) = CO x PVR
(Pulmonary artery pressure - RT atrial pressure) = CO x PVR
(Pulmonary artery pressure - LT atrium pressure) = CO/ PVR
(Pulmonary artery pressure - RT atrium pressure) = CO/ PVR
Which TA's are better?
Trad
PBL :-)
