select the meaning of the underlined word in the following sentence ten patients will receive the experimental drug while 10 take a placebo
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HESI A2

HESI A2 Vocabulary 2024

1. What is the meaning of the word 'placebo' in the following sentence: 'Ten patients will receive the experimental drug while 10 take a placebo'?

Correct answer: C

Rationale: In the context of the sentence, the word 'placebo' refers to a substance or treatment that resembles a real medical treatment but has no therapeutic effect. It is used as a standard against which the effects of the experimental drug are compared. A placebo is typically included in a control group in medical research to evaluate the actual effects of the experimental drug. Therefore, in this scenario, the placebo serves as a control to gauge the effectiveness of the experimental drug, making choice C the correct answer. Choices A, B, and D are incorrect because a placebo is not a fallback, substitute, or curative treatment in this context.

2. What is another word for unruffled?

Correct answer: D

Rationale: Unruffled means calm and not agitated. The word 'composed' also means calm and collected, making it the correct synonym in this context. 'Concerned' (choice A) means worried or anxious, 'wholesome' (choice B) means promoting health and well-being, and 'tedious' (choice C) means boring or monotonous, making them all incorrect choices.

3. LABILE also means .

Correct answer: A

Rationale: The word 'labile' is used to describe something that is constantly changing or easily altered. Therefore, the best synonym for 'labile' is 'extremely changing.' Choice B, 'suicidal,' is incorrect as it does not relate to the meaning of 'labile.' Choice C, 'rapidly changing,' is close but not as precise as 'extremely changing.' Choice D, 'with a high fever,' is completely unrelated to the meaning of 'labile.'

4. What is the meaning of the word 'insidious' in the sentence 'The 'insidious' disease was well established before becoming apparent'?

Correct answer: C

Rationale: The correct answer is C: 'Gradual.' In the context provided, 'insidious' describes a disease that develops slowly and harmfully over time, without being easily noticed. Choices A, B, and D are incorrect. 'Sudden' (choice A) means something happening quickly or unexpectedly, 'Suffer' (choice B) means to experience pain or hardship, and 'Graduate' (choice D) means to successfully complete a process or course of study, none of which capture the intended meaning of 'insidious' in this context.

5. Which word is not spelled correctly in the sentence: 'The physician thought it was unnecessary to explain the procedure.'

Correct answer: B

Rationale: The word 'unnecessary' is misspelled as 'unecessary' in the sentence. The correct spelling should have double 'n' as in 'unnecessary'. Choice A, C, and D are spelled correctly in the sentence provided.

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