What is a potential result of impaired kidney function during aging?

• A. Improved toxin elimination
• B. Increased fluid retention
• C. Enhanced filtering of blood
• D. Stronger bladder control

Answer: (B)

Impaired kidney function is a common consequence of aging, and it significantly affects how the body manages various substances, including fluids. One of the primary roles of the kidneys is to filter waste and excess fluid from the bloodstream, which is then excreted as urine. When kidney function declines, the kidneys become less effective at removing excess fluids from the body, leading to increased fluid retention. This can result in swelling, particularly in the extremities, and may contribute to other health issues such as hypertension and heart problems.

In contrast, other choices suggest improvements in kidney function or unrelated benefits which do not align with the reality of aging and impairment in renal capabilities.