what is the meaning of the word overturn in the last paragraph of the passage

HESI A2

Reading Comprehension HESI A2 Practice Test

1. What is the meaning of the word overturn in the last paragraph of the passage?

A. Justify
B. Invalidate
C. Support
D. Review

Correct answer: B

Rationale: The word "overturn" means to invalidate or negate existing guidelines. In this context, the passage questions whether the findings of the study are substantial enough to change established medical recommendations regarding caffeine intake during pregnancy, making option B the appropriate choice.

2. What is the major difference between matter at the nanoscale and matter at larger scales such as millimeters or inches?

A. At the nanoscale, metals are rigid, and at larger scales, they are bendable.
B. Matter has different and special characteristics at the nanoscale.
C. At the nanoscale, matter has different properties than matter at the atomic level.
D. There is no difference.

Correct answer: B

Rationale: The correct answer is B. Matter at the nanoscale exhibits unique and special characteristics that distinguish it from matter at larger scales. This can include properties like increased surface area, different melting points, altered conductivity, and enhanced reactivity. Choice A is incorrect as metals at the nanoscale can be more rigid compared to their larger scale counterparts. Choice C is incorrect because matter at the nanoscale has properties that are distinct from both atomic and larger scales. Choice D is incorrect as there are significant differences in how matter behaves and interacts at the nanoscale compared to larger scales.

3. What is the main idea of the passage about Sunny-Side Up?

A. There are many positive effects of receiving direct exposure to sunlight.
B. The negative impacts of sunlight should not be ignored.
C. Vitamin D is integral for maintaining healthy bones and preventing diseases.
D. Vitamin D is synthesized by our bodies in reaction to direct sunlight.

Correct answer: A

Rationale: The passage primarily discusses the various positive effects of sunlight exposure, particularly highlighting the benefits of vitamin D for bone health and the regulation of circadian rhythms. While it acknowledges the negative impacts of excessive sun exposure, the emphasis is on the positive aspects, making A the main idea of the passage.

4. The passage lists all of these benefits of omega-3s EXCEPT ___________.

A. Reduced blood pressure
B. Less risk of diabetes
C. Improved memory
D. Alleviated depression

Correct answer: B

Rationale: The passage mentions reduced blood pressure, improved memory, and alleviated depression as potential benefits of omega-3s but does not mention a reduced risk of diabetes.

5. Which of the following statements is an opinion related to Barefoot Running?

A. Running barefoot is natural and advantageous.
B. The cost of modern running shoes keeps increasing.
C. Concrete sidewalks are harder than dirt paths.
D. The arch of the foot gives a spring to the step.

Correct answer: A

Rationale: The statement that "running barefoot is natural and advantageous" reflects a subjective opinion, which cannot be definitively proven or measured objectively. The other statements (B, C, and D) provide factual observations or comparisons that can be validated through evidence, which distinguishes A as the only opinion-based statement.