Question

What is the reason behind the common interchangeability of HCO3 and CO2 in certain contexts?

A. HCO3 and CO2 serve identical functions in the body.
B. It is a common scientific misconception.
C. HCO3 and CO2 are chemically equivalent molecules.
D. They are closely related in acid-base physiology and often used interchangeably for simplicity.

Answer 1

HCO3 and CO2 are often used interchangeably in certain contexts due to their close relationship in acid-base physiology and their ability to regulate pH in the blood.

Step-by-step explanation:

In certain contexts, HCO3 and CO2 are commonly interchanged due to their close relationship in acid-base physiology. When excess hydrogen ions (H+) are present in the blood, they can form carbonic acid (H2CO3), which can then be converted to bicarbonate ions (HCO3-) or carbon dioxide (CO2). This interchangeability helps regulate the pH of the blood and is important for maintaining homeostasis.