15. Record student data below.
Breath-holding interval after a deep inhalation ______ sec
length of recovery period ______ sec
Breath-holding interval after a forceful expiration _______ sec
length of recovery period _______ sec
After breathing quietly and taking a deep breath (which you held), was your urge to inspire or expire?
After exhaling and then holding your breath, did you have a desire for inspiration or expiration?
Explain these results. (Hint: What reflex is involved here?)
