Which term describes urine concentration related to hydration status?

Which term describes urine concentration related to hydration status?

• A. Osmolarity
• B. Volume
• C. pH
• D. Hydration status

Answer: (D)

Urine concentration is described by osmolarity, the measure of solute particles per liter of urine. When you’re well hydrated, antidiuretic hormone (ADH) levels are low, the collecting ducts reabsorb less water, and urine is more dilute with a lower osmolarity. If you’re dehydrated, ADH rises, more water is reabsorbed, and urine becomes more concentrated with a higher osmolarity. Volume, pH, and hydration status describe other aspects of urination or body water balance but do not directly quantify how concentrated the urine is.

Urine concentration is described by osmolarity, the measure of solute particles per liter of urine. When you’re well hydrated, antidiuretic hormone (ADH) levels are low, the collecting ducts reabsorb less water, and urine is more dilute with a lower osmolarity. If you’re dehydrated, ADH rises, more water is reabsorbed, and urine becomes more concentrated with a higher osmolarity. Volume, pH, and hydration status describe other aspects of urination or body water balance but do not directly quantify how concentrated the urine is.