The nurse is teaching a group of grade-school children about body functions. A student asks, "Why do I sneeze?" The nurse's best response is:
1. "A sneeze is caused by a contraction of your throat and lungs."
2. "The back part of your brain is in charge of sneezes and coughs."
3. "A sneeze is your body's way of getting rid of something irritating."
4. "You sneeze because your body needs to take a really deep breath."
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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