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