When the pressure of nitrogen is balanced between the air and your body, you are in a state of?

• A. Equilibrium
• B. Saturation
• C. Hyperbaric
• D. Hypoxic

Answer: (A)

When the nitrogen you breathe and the nitrogen inside your tissues reach the same partial pressure, there’s no net movement of nitrogen into or out of the body. This balance, where the pressures are equal across membranes, is called equilibrium. It means your tissues aren’t gaining or losing nitrogen at that moment. In diving terms, diffusion stops when equilibrium is reached, and problems can arise if you ascend too quickly because the ambient pressure drops and nitrogen comes out of solution too fast. The other terms describe different ideas: saturation is about having maximum dissolved gas at a given pressure, hyperbaric refers to high pressure environments, and hypoxic means insufficient oxygen.