You are teaching a physiology class for prenursing students. A student asks what the purpose of the upper airway is in regard to the lower airway. What would be your best answer?
A) To warm the inspired air
B) To clean the inspired air
C) To clean the expired air
D) To warm the expired air
Ans: A
Feedback: The upper tract, known as the upper airway, warms and filters inspired air so that the lower respiratory tract (the lungs) can accomplish gas exchange.
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A) by the second month.
B) no earlier than the seventh month.
C) only after the sixth month.
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