A client with a prolonged upper respiratory infections seeks medical attention for symptoms of a low-grade fever, poor appetite and headache. If the client has sinusitis in the maxillary sinuses, where will she most likely report feeling pain?

A. Exhalation is the passive phase of normal breathing and occurs without effort during relaxed respiration. It involves the diaphragm and intercostal muscles relaxing, allowing air to flow out of the lungs.
B. Apnea refers to a temporary cessation of breathing and is not a phase of normal breathing.
C. Inhalation is the active phase of normal, relaxed breathing. It requires energy as the diaphragm contracts and moves downward and the intercostal muscles contract to expand the chest cavity, allowing air to enter the lungs.
D. Expiration is another term for exhalation, which is passive during normal relaxed breathing.

A. The cerebellum is involved in coordinating movement and balance but is not primarily responsible for regulating respiration.
B. The diencephalon is involved in sensory processing and regulation of autonomic functions but does not directly control respiration.
C. The cerebral cortex is involved in voluntary control over breathing (such as when you hold your breath), but the central regulation of breathing is managed by the brainstem.
D. The brainstem (specifically the medulla oblongata and pons) is the primary control center for respiration. It regulates the rate and depth of breathing by responding to levels of oxygen and carbon dioxide in the blood.