Which term describes normal, relaxed breathing?

The term that describes normal, relaxed breathing is "eupnea." Eupnea refers to the effortless and regular breathing pattern that occurs at rest. It signifies a state of balance between oxygen intake and carbon dioxide expulsion, which is necessary for maintaining optimal bodily functions during quiet activities.

In contrast, hypernea refers to an increased depth and rate of breathing, which often occurs during physical exertion or stress. Tachypnea indicates an abnormally rapid breathing rate, while apnea is characterized by a temporary cessation of breathing. These terms highlight variations in breathing patterns, with eupnea specifically denoting the ideal state of normal, unlabored respiration.