Which of the following is the correct metric prefix and its numeric equivalent for 'micro'?
milli, 10^-3
centi, 10^-2
micro, 10^-6
nano, 10^-9
The Correct Answer is C
Rationale:
A. milli, 10^-3: "Milli" represents one-thousandth of a unit, or 10^-3, which is correct for millimeters or milliliters, but does not correspond to "micro."
B. centi, 10^-2: "Centi" represents one-hundredth of a unit (10^-2), used for centimeters or centiliters, and is not equivalent to "micro."
C. micro, 10^-6: "Micro" denotes one-millionth of a unit, or 10^-6. This prefix is used in measurements such as micrograms (µg) or microliters (µL), which are critical in precise medication dosing.
D. nano, 10^-9: "Nano" represents one-billionth of a unit (10^-9), which is smaller than "micro" and is used in specialized contexts, not standard clinical dosing.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. ts: "Ts" is not a standard abbreviation for teaspoon in the household system and may cause confusion with other measurements. Using incorrect abbreviations increases the risk of dosing errors.
B. tbl: "Tbl" typically represents tablespoon, which is a larger volume than a teaspoon. Confusing these units could lead to a significant dosing error.
C. tsp: "Tsp" is the standard abbreviation for teaspoon in the household measurement system. It ensures clarity when measuring small volumes of medication or ingredients, promoting accurate administration.
D. t: Using "t" alone is ambiguous and not a recommended abbreviation for teaspoon. Standardized abbreviations like "tsp" prevent misinterpretation and ensure patient safety.
Correct Answer is D
Explanation
Calculation:
Ordered Dose = 300 mg
Available Dose = 150 mg
Available Volume = 1 mL
Volume to administer = (Ordered Dose / Available Dose) × Available Volume
= (300 / 150) × 1
= 2 × 1
= 2 mL
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