The nurse is teaching a group of grade-school children about body functions. A student asks, Why do ...

Correct Answer: 3
Rationale 1: The diaphragm and other muscles of respiration contract.
Rationale 2: A sneeze is a reflex.
Rationale 3: Sneezing is triggered by irritants in the nasal passages. The diaphragm and other muscles of respiration contract.
Rationale 4: This is not the function of sneezing.
Global Rationale: The URT traps particulate matter and many pathogens, preventing them from being carried to the bronchioles and alveoli, where they would have access to the capillaries of the systemic circulation. A sneeze clears the nasal passages. The diaphragm and other muscles of respiration contract. A sneeze is a reflex that does not require a deep breath.

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