The nurse is conducting a class for nursing assistants. One of the students asks the nurse why blood pressure, pulse, and temperature are called "vital signs". Which of the following explanations would the nurse offer the student?
a. "They are called vital signs because the blood pressure is very important."
b. "Because significant deviation from normal is not compatible with life."
c. "The term has just evolved over time without a clear definition for why."
d. "They are called vital signs because they are the first things the nurse does when admitting a patient to the hospital."
Answer: b. "Because significant deviation from normal is not compatible with life."
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