The nurse notes that the specific gravity of urine is lower in infants than in older children. The nurse recognizes that the rationale for this difference is related to:
1. The infant having a greater body surface area.
2. The infant having a higher basal metabolic rate.
3. The infant having a greater percentage of body weight that is water.
4. The infant's kidneys being less able to concentrate urine.
4
Rationale 1: Although this is true, it does not explain the lower specific gravity.
Rationale 2: This statement is true but does not explain the specific gravity differences.
Rationale 3: Although the statement is true, it does not explain the specific gravity differences.
Rationale 4: This statement is accurate and explains why the specific gravity of the infant's urine is closer to water than an older child's urine specific gravity.
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