Question

CO₂, if present in excess, lowers the pH of body fluids.
a) True
b) False

Answer 1

Excess CO2 can lower the pH of body fluids by forming carbonic acid. The respiratory system regulates CO2 levels to maintain pH balance.

Step-by-step explanation:

Excess CO2 in the body, if present in excess, can lower the pH of body fluids. When CO2 reacts with water, it forms carbonic acid, which increases the acidity of the blood, leading to a decrease in pH. This can be regulated by the respiratory system, which adjusts the levels of CO2 in the blood through respiration.