You are presented with the quiz "What is affected by too fast or slow respirations?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "blood pH may become unbalanced if the rate of breathing is too fast or too slow" and "slow and fast respirations or long periods without a breath are common in the dying child". 

So, what's the best answer to the question?


 

     blood pH      