Question

When the level of CO2 in the blood increases, the

A) pH of the blood goes up
B) receptors in the blood vessels sense the pH change
C) Medulla sends a signal to slow the breathing rate
D) all of these

Answer 1

B) receptors in the blood vessels sense the pH change

Step-by-step explanation:

When the level of CO2 in the blood increases, it forms carbonic acid and lowers the pH of the blood, which is detected by receptors in the blood vessels.