North Carolina EMT State Practice Exam

At what point does the upper airway end?

1. At the nasal cavity

2. At the trachea

3. At the vocal cords

4. At the diaphragm

The correct answer is: At the vocal cords

The upper airway ends at the vocal cords, which are located in the larynx. This anatomical distinction is important because the upper airway is responsible for filtering, warming, and humidifying air as it enters the lungs. The nasal cavity and pharynx are parts of the upper airway, but they do not mark its endpoint. The diaphragm is a muscle involved in respiration and does not relate directly to the upper airway's structure. Understanding the division between the upper and lower airways is crucial for EMTs and paramedics, as it pertains to airway management and potential interventions in cases of obstruction or injury. The vocal cords play a critical role in protecting the lower airway by preventing foreign objects and fluids from entering the trachea and the lungs. Recognizing the significance of the vocal cords can aid in identifying procedures related to airway protection and management during emergencies.