Which method of exposure can occur through the air and is relevant for inhalation studies?

Inhalation studies focus on understanding the effects of substances that enter the body through the respiratory system. All the methods listed—dust, mist, and gas—represent different forms of airborne substances that can be inhaled, making them significant in inhalation toxicity assessments.

Dust consists of solid particles suspended in the air, which can be inhaled into the lungs. It may originate from various sources, including industrial processes or natural occurrences, and is crucial in evaluating chronic exposure effects.

Mist refers to tiny liquid droplets that are dispersed in the air. Inhalation of mists is particularly relevant in studies involving aerosols or droplets from sprays and other liquid materials. It is essential to understand how these substances can enter the respiratory system and potentially pose health risks.

Gas is the third method of exposure in this context. Gases can easily diffuse into the lungs and are often involved in acute and chronic exposure studies. The impact of gases on health can vary widely depending on their chemical properties, concentrations, and the duration of exposure.

Given that all three forms—dust, mist, and gas—represent valid pathways through which substances can be inhaled, the most comprehensive answer to the question is that all of the listed methods of exposure are relevant in inhalation studies.