A precaution is an action taken to prevent harm or reduce risk. Option C best matches this meaning. NEX questions frequently use safety-related vocabulary.

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Gustatory cells are sensory receptors responsible for taste and are located primarily in taste buds on the tongue. These cells are stimulated by chemical substances that are dissolved in saliva. When food dissolves in saliva, the dissolved molecules bind to receptors on gustatory cells, triggering nerve impulses that are interpreted by the brain as taste. Movement of otoliths is related to balance in the inner ear, deep pressure changes stimulate mechanoreceptors, and photons of light stimulate photoreceptors in the eye. The NEX Science exam frequently tests sensory physiology by asking students to match receptors with the correct type of stimulus. Recognizing that taste is a chemical sense dependent on substances in solution is fundamental.

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“Initial” refers to the first stage or beginning of something. Option B best matches this definition. NEX questions frequently test sequencing vocabulary.

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“Frequent” means occurring often or regularly. Option B is correct. Recognizing time- and frequency-related words is common on the NEX exam.

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“Reluctant” describes someone who is unwilling or hesitant to act. Option C best matches this meaning. The other options suggest eagerness or readiness, which are opposites. Context clues on the NEX often rely on emotional tone.

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To contribute means to add to or help bring about a result. Option B is the correct synonym. The other options describe the opposite action. NEX vocabulary often includes cause-and-effect language.

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Water is a polar molecule because it has an unequal distribution of electrical charge, with a slightly negative oxygen atom and slightly positive hydrogen atoms. This polarity causes water molecules to attract one another through hydrogen bonding. Option C demonstrates this property because water molecules stick together (cohesion) and do not mix with nonpolar substances like oil. Oil molecules lack polarity and cannot form hydrogen bonds with water, so the two substances separate into layers. The other options describe physical movement, gravity, or resistance, none of which are direct results of polarity. The NEX Science exam frequently tests molecular properties such as polarity by connecting them to real-world examples like oil and water separation. Recognizing hydrogen bonding and cohesion as outcomes of water’s polarity is essential for answering these questions correctly.

The passage clearly states that older adults are particularly vulnerable to dehydration. Option C is directly supported. The other groups are not mentioned. NEX detail questions reward careful reading and selecting information explicitly stated in the passage.

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The passage discusses several strategies that help improve time management, including creating schedules, prioritizing tasks, and setting realistic goals. Option B directly reflects one of these strategies. The other options contradict or ignore the recommendations in the passage. Avoiding deadlines and working without schedules would worsen time management, and studying without breaks is not mentioned. On the NEX exam, reading comprehension questions often focus on identifying practical strategies or recommendations explicitly stated in the passage. Selecting prioritizing tasks demonstrates accurate understanding of the author’s suggestions.

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The passage clearly states that documentation ensures continuity of care by allowing healthcare providers to understand patient history and make informed decisions. Option B directly reflects this purpose. The passage does not claim that documentation replaces care, eliminates all errors, or reduces workload. NEX passages often emphasize communication and record-keeping as foundational healthcare skills, making continuity of care a key concept.

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