HESI A2 Practice Test Vocabulary

Correct Answer: C

Rationale: The correct answer is C: Surveillance. Under observation means being watched or monitored, which aligns with the definition of surveillance. Surveillance involves keeping a close watch over someone or something. Cognition (A) refers to mental processes, Isolation (B) means being separated or alone, and Assessment (D) involves evaluating or judging. These choices do not directly relate to being under observation.

Correct Answer: A

Rationale: The correct answer is A: Gradual. In the context of disease development, "insidious" means slow and subtle in onset. This term implies a gradual progression without immediate noticeable symptoms. Choice B, momentous, means significant or important, which is not related to the gradual nature of the disease. Choice C, sudden, is the opposite of insidious, indicating a rapid onset. Choice D, innocuous, means harmless, which is not relevant to the negative connotation of insidious in disease development.

Correct Answer: B

Rationale: The correct answer is B: Reason. 'Rational' is related to reason, logic, and sound judgment. It implies making decisions based on logical thinking rather than emotions. Angry (A) does not relate to 'rational.' Rodent (C) and Proportion (D) are also unrelated to the meaning of 'rational.'

Correct Answer: A

Rationale: The correct answer is A: Plethora. 'Cornucopia' refers to an abundance or a large quantity of something. It is often symbolized by the horn of plenty overflowing with fruits and flowers. A is the best fit as it directly relates to the concept of abundance. B: Ostracism means exclusion or rejection, not abundance. C: Laborious means requiring a lot of effort or hard work, opposite in meaning to abundance. D: Pensive means deeply thoughtful or reflective, not related to abundance.

Correct Answer: C

Rationale: The correct answer is C: "They're, their." Step 1: "They're" is a contraction for "they are," indicating the subject of the sentence having trouble. Step 2: "Their" is a possessive pronoun showing ownership of the new dog. Therefore, the correct usage is "They're having trouble with their new dog." Other choices are incorrect because: A: "There, their" - "There" is an adverb indicating a place, not suitable in this context. B: "Their, there" - Incorrect word order, as "their" should come before the verb. D: "Their, they're" - Incorrect usage of "they're" as a possessive pronoun.