The ventilation-perfusion ratio is the same in the lung apex and the lung base in a standing normal person. True or False - ANSWERFalse. In a standing normal person, the ventilation-perfusion ratio is higher in the lung base compared to the lung apex. This is due to the effects of gravity, which le...
BIO 669 Exam 3 Questions &
Answers(RATED A+)
The ventilation-perfusion ratio is the same in the lung apex and the lung base in a standing normal
person. True or False - ANSWERFalse. In a standing normal person, the ventilation-perfusion ratio is
higher in the lung base compared to the lung apex. This is due to the effects of gravity, which leads to
better ventilation at the base of the lungs where perfusion is also relatively higher.
Vital Capacity is comprised of all of the following volumes EXCEPT:
Residual Volume
Tidal Volume
Inspiratory reserve volume
Expiratory reserve volume - ANSWERResidual Volume, Vital Capacity is the maximum amount of air a
person can expel from the lungs after a maximum inhalation.
It includes Tidal Volume, Inspiratory Reserve Volume, and Expiratory Reserve Volume.
Residual Volume, however, is the volume of air still remaining in the lungs after the most forcible
expiration.
How is most of the CO2 transported in the blood? - ANSWERAs bicarbonate (HCO3-) that can be
converted back to CO2.
Most of the CO2 in the blood is transported in the form of bicarbonate ions (HCO3-) dissolved in the
plasma. This bicarbonate can be converted back to CO2 in tissues where it is needed for elimination
through respiration.
The amount of quiet inhalation/exhalation in a typical breath is termed what? - ANSWERTidal
Volume
How is alveolar volume measured? - ANSWERindirectly by measuring PaO2 or PaCO2.
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