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| Section | Objectives |
|---|---|
| Science | - Biology
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| Mathematics | - Word Problems
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| Verbal Skills | - Language Usage
|
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NEW QUESTION # 106
The graphs show systolic blood pressure for four clients before and after starting a new medication.
What can be inferred from the information displayed?
Answer: A
Explanation:
This problem tests data interpretation and inference. The graphs show different patterns for each client. Some clients clearly show a decrease in systolic blood pressure after starting the medication, while others show little change or variability. Because not all clients show a decrease, options C and D are incorrect. Option B suggests increased variability, which is not consistently supported across all graphs. Option A accurately summarizes the data by stating thatsomeclients experienced a decrease. On the NEX exam, inference questions often require cautious conclusions rather than absolute statements. Words like "some" and "tended to" are important clues to correct answers.
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NEW QUESTION # 107
Which of the following molecules is an electrolyte normally found in the blood?
Answer: A
Explanation:
Electrolytes are charged ions that help regulate nerve function, muscle contraction, and fluid balance in the body. Calcium ions (Ca²#) are an important electrolyte found in the blood and play a crucial role in muscle contraction, blood clotting, and nerve signaling. Water is not an electrolyte because it does not carry a charge.
Iodine is a trace element but not a primary blood electrolyte. Lactase is an enzyme involved in digestion, not an electrolyte. The NEX Science section often includes questions related to human physiology and emphasizes understanding ions and their roles in body function.
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NEW QUESTION # 108
The thymus, lymph nodes, and spleen are all organs of which system?
Answer: B
Explanation:
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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NEW QUESTION # 109
Review the table of undisturbed sedimentary rock strata below.
According to the table, which of these fossils is the oldest?
Answer: A
Explanation:
This question tests understanding of the law of superposition, a fundamental principle in geology that is frequently tested on the NEX Science exam. The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are found at the bottom, while the youngest layers are found at the top. In the table shown, the soil surface is at the top, followed by Fossil D, Fossil C, Fossil B, and Fossil A at the bottom.
Because Fossil A is located in the lowest rock layer, it must be the oldest fossil. Fossils found in higher layers were deposited more recently. The key word in the question is "undisturbed," which means the layers have not been mixed or overturned by geological processes. The NEX exam often emphasizes recognizing this clue to correctly apply the law of superposition. Therefore, Fossil A is the correct answer because it represents the earliest life form preserved in the rock strata.
NEW QUESTION # 110
Reading Comprehension
Passage:
Vaccination programs rely on widespread participation to be effective. When a large portion of the population is vaccinated, herd immunity helps protect individuals who cannot be vaccinated.
What is the primary benefit of herd immunity?
Answer: C
Explanation:
The passage explains that herd immunity occurs when a large percentage of the population is vaccinated, which helps protect those who cannot receive vaccines. Option B correctly states this benefit. The passage does not suggest that herd immunity eliminates all diseases or replaces hygiene practices. It also does not mention reducing side effects. On the NEX exam, cause-and-effect questions require identifying the specific outcome discussed rather than making broad assumptions. Herd immunity's protective effect on vulnerable individuals is the key idea.
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NEW QUESTION # 111
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