NEX Exam Dumps - NLN Nursing Education Program Questions and Answers

The thymus, lymph nodes, and spleen are key components of the immune system. The immune system is responsible for defending the body against pathogens such as bacteria, viruses, and other foreign invaders. The thymus plays an important role in the maturation of T lymphocytes (T cells), which are critical for adaptive immunity. Lymph nodes filter lymphatic fluid and trap pathogens, allowing immune cells to recognize and respond to infections. The spleen filters blood, removes old or damaged red blood cells, and helps initiate immune responses to blood-borne pathogens. While the endocrine system regulates hormones, the cardiovascular system transports blood, and the integumentary system protects the body externally, none of these systems include the thymus, lymph nodes, and spleen as primary organs. The NEX Science exam often tests system identification by grouping organs with shared functions, making the immune system the correct choice.

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The passage emphasizes the importance of clear communication between healthcare professionals and patients. It explains that when communication is poor, negative consequences such as medication errors and missed appointments can occur, ultimately affecting health outcomes. These supporting details all point to one central idea: effective communication in healthcare is essential for positive patient outcomes. Option B accurately summarizes this main idea. Option A shifts responsibility entirely to patients, which is not stated. Option C focuses on one consequence rather than the overall message. Option D is incorrect because the passage implies errors can be prevented with better communication. On the NEX exam, main-idea questions require identifying the broad message supported by multiple details rather than focusing on a single example.

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Commensalism is a type of symbiotic relationship in which one organism benefits while the other is unaffected. An example is barnacles attaching to whales, where the barnacles gain transportation and access to food, while the whale is neither helped nor harmed. Mutualism benefits both organisms, parasitism benefits one while harming the other, and predation involves one organism killing another for food. Understanding ecological relationships is a key topic on the NEX Science exam, and recognizing the differences between types of symbiosis is essential.

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“Decline” can mean either to refuse or to decrease. Option C captures both meanings. The other options are opposites or unrelated. Understanding multiple meanings of common words is important for the NEX verbal section.

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Vestigial structures are anatomical features that are reduced in size and function compared to their ancestral form. In whales, vestigial leg bones are remnants of hind limbs that were fully functional in land-dwelling ancestors. These bones no longer serve a locomotor purpose but provide strong evolutionary evidence of descent from terrestrial mammals. The spinal column, rib cage, and jawbones are found in many vertebrates and do not specifically indicate a land-based ancestry. Vestigial leg bones, however, directly point to a time when whales had legs and lived on land before adapting to an aquatic environment. The NEX Science exam frequently tests evolutionary evidence, especially the significance of vestigial structures as proof of common ancestry and evolutionary change over time.

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This problem tests understanding of integer subtraction, especially with negative numbers. On the number line, −3 is already below zero. Subtracting 7 means moving seven more units to the left. Starting at −3 and moving left seven spaces results in −10. Another way to think about this is to rewrite the problem as adding a negative number: −3 − 7 is the same as −3 + (−7). When adding two negative numbers, you add their absolute values and keep the negative sign. The absolute values of −3 and −7 are 3 and 7, and 3 + 7 = 10, so the result is −10. Option A is therefore correct. Option B is a common mistake when students subtract absolute values incorrectly. Options C and D are positive and would only occur if the signs were misunderstood. The NEX Math Section frequently includes integer operations to assess number sense and sign awareness.

“Assist” means to help or support. Option B is the correct synonym. The remaining options describe actions that oppose assistance. NEX verbal questions frequently use healthcare-related vocabulary like assist, administer, and support.

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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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The passage states that regular exercise strengthens the heart muscle and increases endurance. Option B is therefore correct. The remaining options are not mentioned. The NEX exam frequently includes health-related passages that test recognition of stated benefits.

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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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