HESI A2 Reading Comprehension V1 2024

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.

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: 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: C

Rationale: The correct answer is C because the author's primary purpose is to inform the reader about how an electrocardiograph reads the electric currents emitted by the heart. This is evident as the essay likely discusses the technical aspects of electrocardiography. Choice A is incorrect because there is no indication of persuasion in the essay. Choice B is incorrect as the focus is not on entertaining but on providing information. Choice D is incorrect as the essay is not about analyzing the differences between specific nodes in the heart.

Correct Answer: B

Rationale: The correct answer is B: Releasing. In the context of the second paragraph, 'emitting' refers to giving off or releasing something, which aligns with the overall meaning of the paragraph. 'Repelling' (A) means to push away, 'Closing' (C) means to shut or block, and 'Charging' (D) means to energize with electricity - these choices do not fit the context of the paragraph. Therefore, B is the most suitable choice based on the definition and context of the word 'emitting.'