10 Questions
What condition leads to an imbalance between ventilation rate and blood flow through the pulmonary circuit?
Pulmonary embolism
Where does a low V̇/Q̇ ratio naturally occur in the lungs?
Base of the lung
In which condition do the airways become stenosed or occluded, leading to a low V̇/Q̇ ratio?
Asthma
Which factor leads to hypoxic pulmonary vasoconstriction, resulting in pulmonary hypertension?
High PAO2 or low PACO2 in the alveolus
What is the main form of CO2 transport in blood involving bicarbonate anions?
Dissolved in plasma and RBCs
Which factor affects oxygen saturation by binding to hemoglobin much more strongly than oxygen?
CO
What happens to carboxyhemoglobin when the partial pressure of oxygen in the alveoli is increased?
Dissociates into CO2 and H+
What is the form of hemoglobin that has a much higher affinity for oxygen than adult hemoglobin?
(F) Fetal Hemoglobin
'V̇' in V̇/Q̇ ratio refers to:
'Ventilation' rate
'Q̇' in V̇/Q̇ ratio stands for:
'Perfusion' rate
Learn about the process of alveolar gas exchange where oxygen and carbon dioxide are exchanged in the alveoli to oxygenate blood. Understand how pulmonary artery and vein, as well as hemoglobin, play a crucial role in this physiological process.
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