What pathway allows isotopes to enter the body through normal breathing?

Inhalation is the pathway that allows isotopes to enter the body through normal breathing. When an individual breathes in, air containing various particles, gases, or isotopes can enter the respiratory system. This process involves the inhalation of air, which may contain radioactive materials. Once inhaled, these isotopes can reach the lungs and then transfer into the bloodstream, leading to potential internal exposure to radiation.

This method of exposure is particularly significant because it can lead to immediate and significant doses of radiation depending on the concentration of isotopes in the inhaled air and the duration of exposure. Understanding inhalation as a route of entry into the body is essential in radiation safety, as it helps in assessing the potential health risks associated with airborne radioactive substances.

Other pathways, such as absorption, ingestion, and dermal exposure, refer to different mechanisms of entering the body. Absorption typically involves taking substances through the skin or mucous membranes, ingestion relates to consuming substances orally, and dermal exposure refers to contact with radioactive materials on the skin. While these pathways are important in the context of radiation safety, inhalation is specifically applicable to the question about entering the body through normal breathing.