Posted: December 2nd, 2015

Explain why you are able to hold your breath longer after hyperventilation. Include in you answer the stimuli and respiratory centers that regulate breathing.

1. Explain why you are able to hold your breath longer after hyperventilation. Include in you answer the stimuli and respiratory centers that regulate breathing.
2. Explain why you were able to hold your breath for less time following breathing into and out of the paper bag.
3. What makes a phenolphthalein solution change from pink to colorless? If this color change happens more quickly after exercise, is that an indication that exercise has raised or has lowered the amount of CO₂ in your expired air? How might exercise change the amount of CO₂ in your expired air?