Physiology If a region or compartment is in a steady state with respect to a particular substance, then: A The amount of the substance in the compartment is increasing B The amount of the substance in the compartment is decreasing C The amount of the substance in the compartment does not change with respect to time D There is no movement into or out of the compartment 💡 Explanation If a region or compartment is in a steady state with respect to a particular substance, then: ✓ Correct Answer: C. The amount of the substance in the compartment does not change with respect to time