Complex sentence: In hyperpnea, increased ventilation is "appropriate" for a metabolic acidotic state (also known as respiratory compensation) whereas in hyperventilation, increased ventilation is "inappropriate" for the metabolic state of blood plasma.
Split into simpler sentences: In hyperpnea, increased ventilation is "appropriate" for a metabolic acidotic state, this is also known as respiratory compensation. Whereas in hyperventilation, increased ventilation is "inappropriate" for the metabolic state of blood plasma.