Final answer:
The prefix hyper- in hyperpnea means excessive. Hyperpnea is an increased depth and rate of ventilation in response to an increase in oxygen demand.
Step-by-step explanation:
The prefix hyper- in the term hyperpnea means excessive. Hyperpnea refers to an increased depth and rate of ventilation in response to an increase in oxygen demand, such as during exercise or disease.
It is different from hyperventilation, which is an increased ventilation rate independent of cellular oxygen needs and leads to low blood carbon dioxide levels and high blood pH.