The correct answer is:
B) transport more oxygenated blood to her muscles.
During physical activity, muscles require more oxygen to produce energy, which results in an increase in both breathing and heart rates to meet this demand.
When an athlete began running, both her breathing and heart rates increased.
The athlete’s breathing and heart rates increased as she was running because the athlete needed to
A
increase the amount of carbon dioxide in her blood.
B
transport more oxygenated blood to her muscles.
C
exhale more oxygen from her lungs.
D
decrease the temperature of her skin.
1 answer