Which of the following signs of inadequate breathing is more prominent in children than in adults?

• A. Bradycardia
• B. Cyanosis
• C. Use of accessory muscles in the neck
• D. Nasal flaring

Answer: (D)

Verified step by step guidance

1. Understand the physiological differences between children and adults in terms of respiratory mechanics. Children have smaller airways and less developed respiratory muscles, making them more prone to showing distinct signs of respiratory distress.
2. Recognize that nasal flaring is a prominent sign in children because it helps reduce airway resistance during inhalation. This is a compensatory mechanism to improve airflow when breathing is inadequate.
3. Compare the other options: Bradycardia (slow heart rate) and cyanosis (bluish discoloration of the skin due to lack of oxygen) are general signs of severe respiratory distress and can occur in both children and adults, but they are not specific to children.
4. Understand the use of accessory muscles in the neck. While this can occur in both children and adults during respiratory distress, it is not as prominent or specific to children as nasal flaring.
5. Conclude that nasal flaring is the correct answer because it is a more distinct and observable sign of inadequate breathing in children compared to adults, due to their unique anatomical and physiological characteristics.