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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Verbal Ability | 34% | - Reading Comprehension
|
| Topic 2: Science | 38% | - Health
|
| Topic 3: Mathematics | 28% | - Data & Information
|
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NEW QUESTION # 104
A nurse needs to administer 0.75 liters of IV fluid over 3 hours. What is the flow rate in milliliters per hour?
(1 liter = 1,000 milliliters)
Answer: C
Explanation:
This question tests unit conversion and rate calculation, both of which are essential skills on the NEX Math Section, especially for medication and IV flow problems. First, convert liters to milliliters because flow rates are typically expressed in milliliters per hour. Since 1 liter equals 1,000 milliliters, multiply 0.75 liters by
1,000 to get 750 milliliters. Next, determine the flow rate by dividing the total volume by the total time. The fluid is administered over 3 hours, so divide 750 milliliters by 3 hours. This calculation gives 250 milliliters per hour. Therefore, the correct answer is option C. Option A results from dividing incorrectly, option B reflects underestimation, and option D would be correct only if the volume were larger. NEX exam questions often focus on proper setup of unit conversions before performing calculations. Always convert units first, then divide by time to find a rate.
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NEW QUESTION # 105
A scientist removes the pancreas from laboratory rats. In a few days, what would most likely be observed?
Answer: A
Explanation:
The pancreas produces insulin, which regulates blood glucose levels. Without insulin, glucose cannot efficiently enter cells, leading to hyperglycemia. Removing the pancreas would therefore cause blood glucose levels to rise. This concept is directly related to diabetes physiology and is a common topic on the NEX Science exam.
NEW QUESTION # 106
Reading Comprehension
Passage:
Vaccinations work by stimulating the immune system to recognize and fight specific pathogens. Once vaccinated, the body can respond more quickly if exposed to the disease in the future, often preventing illness entirely.
Which statement best explains how vaccines protect the body?
Answer: A
Explanation:
The passage explains that vaccines stimulate the immune system so it can recognize pathogens and respond more quickly in the future. This means vaccines act as a training mechanism for the immune system. Option C correctly reflects this explanation. Option A is incorrect because vaccines do not eliminate all bacteria permanently. Option B is the opposite of what the passage states, as vaccines strengthen immune response.
Option D is incorrect because vaccines are preventive, not treatments administered after symptoms appear.
NEX reading comprehension questions often test understanding of scientific processes explained in simple language, and correct answers usually restate information using different wording rather than introducing new ideas.
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NEW QUESTION # 107
The light-sensitive cells of the eye are called rods and cones. In which of these layers of the eye are they found?
Answer: B
Explanation:
Rods and cones are photoreceptor cells responsible for detecting light and color. These specialized cells are located in the retina, which is the innermost layer of the eye. The retina converts light energy into electrical signals that are transmitted to the brain via the optic nerve. Rods are more sensitive to low light and are important for night vision, while cones detect color and fine detail. The sclera is the tough, white outer layer of the eye that provides protection. The choroid contains blood vessels that supply nutrients to the eye, and the cornea is the transparent front portion that helps focus incoming light. Because rods and cones must directly receive light to function, they are located in the retina. This concept is commonly tested on the NEX Science exam in questions related to sensory organs and physiology.
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NEW QUESTION # 108
What stimulates gustatory (taste) cells?
Answer: C
Explanation:
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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NEW QUESTION # 109
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