Noun
energetic (deep and rapid) respiration that occurs normally after exercise or abnormally with fever or various disorders
Source: WordNetBlood levels of carbon dioxide, and the neurological feedback mechanism that monitors them, do not react quickly enough to maintain an even respiratory rate, with the entire system cycling between apnea and hyperpnea, even during wakefulness. Source: Internet
During hyperpnea ostriches pant at a respiratory rate of 40–60 cycles per minute, versus their resting rate of 6–12 cycles per minute. Source: Internet