Final answer:
A high blood urea content often indicates poorly functioning kidneys, which are responsible for filtering waste such as urea from the blood.
Step-by-step explanation:
Your mother, who has a high blood urea content, most likely has a poorly functioning kidney. High levels of urea in the blood, a condition known as uremia, can be a sign of kidney disorders. The kidneys are essential organs for filtering waste products from the blood, regulating electrolytes like sodium and potassium, and maintaining overall homeostasis. When kidney function is impaired, harmful substances such as urea can accumulate in the blood, leading to renal uremia. Apart from kidney-related issues, pre-renal and post-renal factors can also affect urea levels, these being related to conditions affecting blood flow to the kidneys or urinary tract obstructions, respectively.