Thallium is primarily absorbed through which route?

Thallium is primarily absorbed through the gastrointestinal tract, which is the correct response. When thallium enters the body, it can be ingested through contaminated food or water, making the gastrointestinal system the main pathway for absorption. Once ingested, thallium can readily enter the bloodstream and distribute throughout the body, leading to its potential toxic effects.

The other routes of absorption, while possible in certain contexts, are not the primary means of thallium uptake. For instance, while thallium can enter the body through the respiratory system if inhaled, this route is less common compared to ingestion. Intravenous injection is not a typical exposure route for thallium, as it is not administered this way in clinical scenarios. Dermal contact may lead to minimal absorption in specific situations, but it is not the primary route of exposure. Understanding the main pathways of thallium absorption is crucial for toxicological assessments and safety protocols.