HESI A2 Reading Comprehension V1 2024

Correct Answer: C

Rationale: The correct answer is C: disease-causing substances. In the first paragraph, pathogens are referred to as agents capable of causing disease. The term 'pathogens' specifically encompasses various microorganisms like bacteria, viruses, fungi, and parasites that can infect a host and lead to illnesses. Choice A, diseases, is incorrect as pathogens are the causative agents of diseases. Choice B, vaccines, is incorrect as vaccines are used to prevent diseases caused by pathogens. Choice D, foods, is also incorrect as pathogens are not related to foods but are rather disease-causing agents. Thus, the most appropriate interpretation of 'pathogens' in the context of the paragraph is disease-causing substances.

Correct Answer: D

Rationale: The correct answer is D: for the general public. In the third paragraph, the word 'popular' is used to describe something that is liked, accepted, or enjoyed by a large number of people, which aligns with the definition of being 'for the general public.' Choice A, complicated, is incorrect because 'popular' does not imply complexity. Choice B, old-fashioned, is incorrect as 'popular' suggests current relevance. Choice C, beloved, is incorrect as 'popular' does not necessarily mean deeply loved but rather widely accepted.

Correct Answer: C

Rationale: The correct answer is C: Something that is significant but unusual. In the context of the second paragraph, the word 'phenomenon' is used to describe something that is noteworthy and out of the ordinary. It implies that the subject being discussed is unique or remarkable. Choices A, B, and D are incorrect because they do not capture the essence of 'phenomenon' as being both significant and unusual. Option A focuses on being lifeless, B on nonchalant behavior, and D on chemical origin, none of which align with the meaning of 'phenomenon' in this specific paragraph.

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: B

Rationale: The correct answer is B. In the context of the first paragraph, 'evolved' refers to a gradual development or change over time. This is supported by the mention of changes and advances in technology. 'To spread' (A) does not capture the idea of development, 'revolve' (C) means to rotate around a central point, and 'shift' (D) implies a sudden or abrupt change, which does not align with the gradual nature of evolution in this context.