Blood pH may become unbalanced if the rate of breathing is too fast or too slow, and for instance, the normal pH of human blood is maintained at 7.4. Given these facts, what may become unbalanced if the rate of breathing is too fast or too slow among the following options:
- normal eating
 - normal human blood
 - cigarettes
 - normal skin
 - Veins and arteries.
 - Chemical energy
 - kinetic energy
 - normal studying


 

  normal human blood       