20. Circle the term that does not belong in each of the following groupings.
In blood CO2
1. ↑ Respiratory rate
2. Acidosis
↑ Carbonic acid
Alkalosis
Acidosis
pH
↑ pH
3. Acidosis
Hyperventilation
Hypoventilation
CO₂ buildup
4. Apnea
Cyanosis
↑ Oxygen
Oxygen
5. ↑ Respiratory rate
↑ Exercise
Anger
↑ CO2 in blood
6. High altitude
PO2
↑ PCO₂
Atmospheric pressure