Chapter 53 Assisting with analysis of urine

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    What is the primary purpose of analyzing urine?

    To detect diseases or disorders affecting kidneys or urinary tract.

    What does homeostasis refer to?

    The body's internal environment maintained for life.

    What is a nephron?

    The functional unit of the kidney responsible for urine formation.

    How does the glomerulus function in urine formation?

    Filters blood to create filtrate, excluding large proteins and blood cells.

    What is the renal threshold for glucose?

    The blood glucose level above which glucose appears in urine.

    What happens if urine is not analyzed within 2 hours?

    Chemical and cellular components may change, affecting test results.

    What is a clean-catch midstream specimen?

    A urine sample collected to avoid contamination for culture or analysis.

    What does the presence of protein in urine indicate?

    Possible kidney damage or disease, known as proteinuria.

    What is the significance of specific gravity in urine analysis?

    Indicates urine concentration and kidney's ability to concentrate urine.

    What does a positive nitrite test suggest?

    Possible urinary tract infection due to bacterial activity.

    How does bilirubinuria occur?

    Due to liver damage or obstruction, leading to bilirubin in urine.

    What is the role of leukocyte esterase in urine testing?

    Indicates the presence of white blood cells, suggesting infection.

    What is the purpose of a 24-hour urine collection?

    To provide a quantitative analysis of substances like creatinine.

    What does the presence of ketones in urine indicate?

    Fat metabolism, often seen in uncontrolled diabetes or low-carb diets.

    What is the importance of urine color in analysis?

    Indicates hydration status and possible pathological conditions.

    What does turbidity in urine suggest?

    Possible presence of cells, bacteria, or crystals.

    What is the significance of a first morning urine specimen?

    More concentrated, ideal for testing certain analytes like protein.

    What is the purpose of quality control in urinalysis?

    To ensure reliability and accuracy of test results.

    What does hematuria indicate?

    Presence of blood in urine, suggesting possible injury or infection.

    What is the role of a reagent strip in urinalysis?

    Detects various chemicals in urine through color change reactions.

    What is the expected urine volume for a healthy adult in 24 hours?

    Approximately 800 to 2000 mL.