HESI A2 Reading Comprehension V1 2024

Correct Answer: C

Rationale: The correct answer is C because it accurately summarizes the key points of the passage about the ECG. It mentions that the ECG measures the stages of the 'wave of excitation' within the heart and its three distinct steps. It also describes how this wave spreads from the SA node to the AV node. Choice A is incorrect because it focuses on electrostatic charges set off by the heart, which is not the main focus of the passage. Choice B is incorrect because it talks about unique electric currents on the surface of the body, which is not the main purpose of the ECG as mentioned in the passage. Choice D is incorrect because it only mentions that the ECG measures electric currents within the body without providing the specifics of the wave of excitation and its stages as described in the passage.

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.

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.

Correct Answer: A

Rationale: The correct answer is A: To consist of. In the context of the first paragraph, 'composed' refers to the elements or parts making up something. The word implies that something is made up of different components. This is evident as the paragraph discusses how the team is composed of individuals with diverse skills and backgrounds. Explanation of why other choices are incorrect: B: To be uniquely discovered - This does not fit the context of the paragraph which is describing the makeup of a team. C: To be set apart - This does not align with the meaning of 'composed' in the context of being made up of different parts. D: To be surprised - This has no relevance to the meaning of 'composed' in the paragraph.

Correct Answer: A

Rationale: The correct answer is A because sound pitch is determined by the frequency of sound waves. When waves are closer together, they have a higher frequency, resulting in a higher pitch. In contrast, when waves are farther apart, the frequency is lower, leading to a lower pitch. Choices B, C, and D are incorrect as they do not directly relate to the frequency of sound waves, which is the key factor affecting pitch.