What percentage of lead is filtered through the kidneys?

The correct answer identifies that 65% of lead is filtered through the kidneys. This percentage reflects the body's ability to process and excrete lead, which is a toxic heavy metal. Understanding the filtration process is crucial for lead supervisors working in environments where lead exposure is a concern, such as in construction or renovation projects involving lead-based materials.

The kidneys play a vital role in filtering contaminants from the blood and maintaining homeostasis. In the case of lead, when it enters the bloodstream, a significant portion is indeed processed by the kidneys for excretion. A thorough understanding of this process is important for lead supervisors to establish appropriate safety protocols and health monitoring for workers who may be exposed to lead.

The other percentages represent different amounts of lead filtration that do not align with the established medical understanding of lead excretion through the renal system. Understanding the correct filtration percentage helps in assessing exposure levels and implementing safe practices, reducing the risk of lead toxicity among workers.