What is the term for an increased rate of respiration?

The correct choice is "Tachypneic," which refers specifically to an increased rate of respiration. The term is derived from the Greek words "tachy," meaning fast, and "pnea," meaning breathing. In a clinical setting, tachypnea is characterized by a respiratory rate that exceeds the normal resting rate, which is typically between 12 to 20 breaths per minute for adults. This increased respiratory rate can occur in response to various physiological stresses, such as fever, anxiety, or exertion, as well as in certain medical conditions.

The other terms provided pertain to different respiratory conditions. Hyperventilation refers to both an increased rate and depth of breathing, often leading to decreased carbon dioxide levels. Dyspneic describes a state of breathlessness or difficulty in breathing, rather than just an increased rate. Apneic signifies a temporary cessation of breathing. Hence, while each term relates to respiration, "Tachypneic" is specifically accurate for describing an increased breathing rate.