HESI A2 Reading Comprehension V1 2024

Correct Answer: A

Rationale: The correct answer is A because the passage does not mention changes in the ECG being used for diagnosing abnormal cardiac rhythm. Step 1: The passage describes the signal having a characteristic record called the electrocardiogram (B). Step 2: It mentions the 'wave of excitation' starting at the SA node (C). Step 3: It also discusses how the 'wave of excitation' spreads through the heart wall accompanied by electric changes (D). Therefore, A is the correct answer as it is not explicitly detailed in the passage.

Correct Answer: A

Rationale: The correct answer is A because baroreceptors and chemoreceptors are sensory receptors that detect changes in blood pressure and blood chemistry, respectively, and send nerve impulses to the brain to regulate these parameters. This is different from the kidneys, which are responsible for regulating blood volume by controlling the balance of salts, water, and waste removal through the production of urine. Therefore, the major difference lies in the function and location of these systems. Choices B, C, and D are incorrect because they either incorrectly describe the functions of baroreceptors, chemoreceptors, and kidneys or provide irrelevant information about their locations and interactions with other organs.

Correct Answer: C

Rationale: The correct answer is C: To inform the reader how the cardiovascular system regulates blood pressure. The writer's primary purpose is to educate the reader about the mechanisms and processes involved in regulating blood pressure within the cardiovascular system. This is evident from the focus on explaining how the cardiovascular system works to maintain blood pressure levels. The other choices are incorrect because they focus on different aspects such as the dangers of high blood pressure (A), the relationship between high blood pressure and heart attacks (B), and persuading the reader about the importance of controlling blood pressure (D), which are not the main objectives of the essay.

Correct Answer: A

Rationale: The correct answer is A: foodborne illnesses. The subject of the passage is foodborne illnesses, as it is the main focus and discussed in detail. The passage may mention other aspects like dangers of uncooked food, bacteria, and proper food preparation, but these are supporting details rather than the main subject. Foodborne illnesses encompass these topics but go beyond them to cover the broader issue of illnesses caused by contaminated food.

Correct Answer: A

Rationale: The correct answer is A: requiring expert knowledge. In the fourth paragraph, the word 'technical' is used in the context of needing specific expertise or skill. The term 'technical' often refers to specialized knowledge or proficiency in a particular field. In this case, the text suggests that a certain level of expertise is necessary to understand or perform the task mentioned. Explanation for why the other choices are incorrect: B: Incomplete - This choice does not align with the context in the paragraph. The word 'technical' does not imply incompleteness, but rather a need for specialized knowledge. C: Foreign - The word 'technical' does not indicate something foreign or unfamiliar, but rather something requiring expertise. D: Plagiarized - This choice is unrelated to the meaning of 'technical' in the context. 'Plagiarized' refers to copying someone else's work without permission, which is not relevant to the paragraph's discussion of expertise.