Final answer:
Hyperpnea is the increased depth and rate of ventilation that occurs during exercise to meet the increased oxygen demand of active tissues.
Step-by-step explanation:
Hyperpnea is an increased depth and rate of ventilation to meet an increase in oxygen demand as might be seen in exercise or disease. This does not significantly alter blood oxygen or carbon dioxide levels, but merely increases the depth and rate of ventilation to meet the demand of the cells. Hyperventilation, on the other hand, is an increased ventilation rate that is independent of the cellular oxygen needs and leads to abnormally low blood carbon dioxide levels and high (alkaline) blood pH.