Biology, 21.10.2020 17:01 lowealiyah6755
In a study of physical endurance, researchers observed signincant increases in the heart rates and breathing rates of participants immediately after they engaged in
strenuous exercise
Which statement best explains the increase in the heart rate and the breathing rated during exercise?
The water concentration in the blood increases.
Body cells require increased oxygen as energy is expended.
Muscle cells increase in temperature and require fuld to reduce the temperature.
An increase in muscle activity causes increases in glucose levels in red blood cells.
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