what are the three steps of the wave of excitation
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HESI A2

HESI A2 Reading Comprehension V1 2024

1. What are the three steps of the 'wave of excitation'?

Correct answer: D

Rationale: The correct steps of the 'wave of excitation' are the excitation of the atrium, excitement of the ventricle, and relaxation of the ventricle. In the described process, the 'wave of excitation' starts with the discharge from the SA node, leading to the excitation of the atrium. Next, the peak ECG corresponds to the excitement of the ventricle, not its relaxation. Finally, the wave concludes with the relaxation of the ventricle, not its contraction. Therefore, choices A, B, and C are incorrect as they do not accurately describe the sequential steps of the 'wave of excitation' as presented in the extract.

2. Which of the following describes the purpose of the passage?

Correct answer: C

Rationale: The correct answer is C. The passage aims to provide an overview of cystic fibrosis (CF) and how it is inherited. It explains that CF is passed down through families due to a defective gene, detailing how this gene affects the body and who is most commonly affected by the disease. Choices A, B, and D are incorrect because the passage does not solely focus on describing the causes of CF, explaining how it is passed down through families, or reviewing why some Americans have CF while others do not. Instead, it provides a broader perspective on CF and its inheritance.

3. Which of the following is not listed as a detail in the passage about A Short History of the CDC?

Correct answer: D

Rationale: The passage does not provide specific details about the divisions that currently make up the CDC. Instead, it focuses on the organization's historical context, original goals, and overall mission. Thus, D is correct as it identifies information not covered in the passage.

4. How does the author want the reader to feel after reading about Bridge?

Correct answer: C

Rationale: The author wants the reader to feel confident and excited about learning the game of Bridge. In the text, the author acknowledges that Bridge can be complicated for beginners but emphasizes that with time, effort, and a good teacher, even novices can become proficient. The tone of the writing is encouraging and informative, providing tips and explanations to help the reader understand the game better and increase their interest in playing Bridge. Choices A, B, and D are incorrect because the text does not convey that the game is too hard for novices, aims to frustrate or confuse the reader, or overwhelm them with rules. Instead, the author's intention is to inspire confidence and excitement in learning this exciting card game.

5. FRAX takes into account all of the following factors EXCEPT ___________.

Correct answer: B

Rationale: FRAX, a tool used to assess fracture risk, considers various factors like lifestyle choices, genetic heritage, and exposure to sunlight. However, exposure to toxins is not mentioned in the provided extract as a factor considered by FRAX. Therefore, the correct answer is B. Exposure to toxins is unrelated to fracture risk assessment as per the information provided. Lifestyle choices, genetic heritage, and exposure to sunlight are all factors that FRAX takes into consideration to determine the risk of experiencing a fracture within the next decade.

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