Explain how a fast heart rate transports lactic acid to the liver and how deeper, faster breathing supplies oxygen for its aerobic breakdown.
An athlete monitored their heart rate and breathing rate before, during and after vigorous exercise.
Fig. 6.1 shows the results.
Fig. 6.1
Complete the sentences to describe and explain the results shown in Fig. 6.1.
After exercise, it takes ____ minutes for the athlete's breathing rate to return to its resting rate.
The heart rate decreases by ____ beats per minute between 20 and 40 minutes.
The heart rate and breathing rate do not immediately return to their resting rates because anaerobic respiration has occurred.
Lactic acid has built up in ____ causing an oxygen ____.
The heart rate remains high to transport lactic acid to the ____.
The breathing rate remains high to supply ____ for the ____ respiration of lactic acid.