Since the clinical thermometer is designed to measure the temperature of the human body only, it displays the range of 35°C to ______ .
- A.42°C
- B.44°C
- C.48°C
- D.46°C
Correct answer
Explanation
The correct answer is A, 42 degrees Celsius. A clinical thermometer is marked from 35 to 42 degrees Celsius, which on the Fahrenheit scale is 94 to 108 degrees. The scale is kept short because human body temperature never strays far from the normal value of about 37 degrees Celsius, or 98.6 degrees Fahrenheit, and a narrow range lets the marks be spaced widely enough to read a change of one tenth of a degree. The mercury type has a kink, a narrow bend just above the bulb, which stops the mercury from running back so the reading can be taken after the thermometer is removed. B, C and D are wrong because temperatures of 44, 46 and 48 degrees Celsius lie far beyond what a living body can reach, so those markings would be wasted; a laboratory thermometer covering about minus 10 to 110 degrees Celsius is used for such higher readings. Exam tip: clinical 35 to 42 degrees Celsius, normal body temperature 37 degrees Celsius.
Practice Questions
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