A 9-year-old boy decided to find out how long he could breathe into and out of a paper bag. After approximately 2 minutes, his friends noticed that he was breathing very rapidly and forced him to stop. Which of the following was the most potent stimulus for the boy's hyperventilation?
A. Decreased arterial $\mathrm { PO } _ { 2 }$
B. Increased arterial $\mathrm { PO } _ { 2 }$
C. Increased arterial $\mathrm { PCO } _ { 2 }$
D. Decreased arterial $\mathrm { PCO } _ { 2 }$
E. Increased $\mathrm { pH }$

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The Answer of A 9-year-old boy decided to find out how long he could breathe into and out of a paper bag. After approximately 2 minutes, his friends noticed that he was breathing very rapidly and forced him to stop. Which of the following was the most potent stimulus for the boy's hyperventilation?
A. Decreased arterial $\mathrm { PO } _ { 2 }$
B. Increased arterial $\mathrm { PO } _ { 2 }$
C. Increased arterial $\mathrm { PCO } _ { 2 }$
D. Decreased arterial $\mathrm { PCO } _ { 2 }$
E. Increased $\mathrm { pH }$

A 9-Year-Old Boy Decided to Find Out How Long He PO2\mathrm { PO } _ { 2 }PO2​

A 9-Year-Old Boy Decided to Find Out How Long He $\mathrm { PO } _ { 2 }$