BIO 669 Exam 3 Questions And Answers 100% Correct
(GRADED A+) Latest Update 2024/2025.
The ventilation-perfusion ratio is the same in the lung apex and the lung base in a standing normal
person. True or False - ANSWER False. 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 - ANSWER Residual 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? - ANSWER As 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? - ANSWER
Tidal Volume
How is alveolar volume measured? - ANSWER indirectly by measuring PaO2 or PaCO2.
Which of the following does NOT have cartilage as part of its structure?
Right mainstem bronchus
Respiratory Bronchioles
Trachea
(GRADED A+) Latest Update 2024/2025.
The ventilation-perfusion ratio is the same in the lung apex and the lung base in a standing normal
person. True or False - ANSWER False. 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 - ANSWER Residual 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? - ANSWER As 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? - ANSWER
Tidal Volume
How is alveolar volume measured? - ANSWER indirectly by measuring PaO2 or PaCO2.
Which of the following does NOT have cartilage as part of its structure?
Right mainstem bronchus
Respiratory Bronchioles
Trachea
