What is defined as respiratory pauses lasting 10 seconds or more?

The correct answer is defined as "apnea," which is characterized by complete cessation of airflow for a duration of at least 10 seconds. During apnea, the individual experiences a temporary halt in breathing, which can lead to significant drops in oxygen levels in the blood. This condition is often associated with sleep disorders such as obstructive sleep apnea, where episodes of stopped breathing can occur repeatedly during sleep, impacting overall health and well-being.

Hypopnea refers to a decrease in airflow that is not a complete cessation, often leading to reduced oxygen saturation but not stopping airflow entirely. Dyspnea is the subjective sensation of difficulty in breathing, which may not be defined strictly by pauses in respiration. Eupnea describes normal, unlabored breathing that does not involve interruptions or alterations. Therefore, only "apnea" correctly fits the definition of respiratory pauses lasting 10 seconds or more.