At high-altitudes, the decrease in the PO2 gradient between...

Name: At high-altitudes, the decrease in the PO2 gradient between the environment and the lungs causes [Select] in ventilation (VE). This causes an increase in CO2 off-loading (exhalation), which in- turn causes blood pH to [Select] . This change in pH causes the oxyhemoglobin dissociation curve to shift [Select] .
Uploaded: 2023-12-26T18:02:53-08:00
Duration: 2 min 18 s
Channel: Adi S
Description: At high-altitudes, the decrease in the PO2 gradient between the environment and the lungs causes [Select] in ventilation (VE). This causes an increase in CO2 off-loading (exhalation), which in- turn causes blood pH to [Select] . This change in pH causes the oxyhemoglobin dissociation curve to shift [Select] .

At high-altitudes, the decrease in the PO$_2$ gradient between the environment and the lungs causes [Select] in ventilation (VE). This causes an increase in CO$_2$ off-loading (exhalation), which in- turn causes blood pH to [Select] . This change in pH causes the oxyhemoglobin dissociation curve to shift [Select] .

Sometimes I look over at my children and they are seeing how long they can hold their breath compared to their sibling. What is the change in blood pH while breath holding and ventilation response after they stop breath holding? pH increases and hypoventilation occurs. pH decreases and hypoventilation occurs. pH increases and hyperventilation occurs. pH decreases and hyperventilation occurs. In the situation of reduced oxygenation, is there a shift and if so, what is the shift in the oxygen dissociation curve? (Black curve is the normal curve, Orange curve is a shift) Graph 1 Graph 2 Graph 4 No shift, instead this example represents movement along the normal curve to values of higher PO2. Graph 3 No shift, instead this example represents movement along the normal curve to values of lower PO2.

Adi S.

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