TOEFL Listening: TPO-TOEFL阅读TPO - 53B59Z4025YW5F6IN$

According to paragraph 2, all of the following are true of the voluntary breathing system EXCEPT: A. It has its control center in the brain stem. B. It controls breathing for a number of activities during wakefulness. C. It is able to bypass the automatic system. D. It produces an irregular breathing pattern.