Question

Every ________, nerve impulses stimulate the breathing process, or ventilation, which moves air through a series of passages into and out of the lungs.




A. 5 to 7 seconds


B. 3 to 5 seconds


C. 1 to 3 seconds


D. 7 to 9 seconds



I think its B
never mind. the correct answer is A
It's not A i took the test and A was wrong.
The answer is B

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