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NEW QUESTION # 19
Word Knowledge
The word"temporary"most nearly means:
- A. Permanent
- B. Severe
- C. Brief
- D. Frequent
Answer: C
Explanation:
Temporary refers to something lasting for a short period of time. Option B correctly reflects this meaning.
Recognizing time-related descriptors is common on the NEX exam.
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NEW QUESTION # 20
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)
- A. 300 mL/hr
- B. 150 mL/hr
- C. 250 mL/hr
- D. 200 mL/hr
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 # 21
You are staining bacterial samples for identification and viewing them under a microscope.
Which bacterial shape do you observe in the sample?
- A. Spirochetes
- B. Bacilli
- C. Vibrios
- D. Cocci
Answer: B
Explanation:
This question tests knowledge of bacterial morphology, which is commonly assessed on the NEX Science exam. Bacteria are often classified based on their shape, which helps in identification and diagnosis. The image shows elongated, rod-shaped bacteria. This shape is characteristic ofbacilli. Bacilli are cylindrical or rod-like and are commonly found in many bacterial species, includingEscherichia coliandBacillus anthracis.
Cocci are spherical in shape, spirochetes are long and spiral-shaped, and vibrios have a curved, comma-like appearance. None of these shapes match the straight rod-like structures shown in the image. Identifying bacterial shape is an important first step in microbiology before further tests such as Gram staining or biochemical analysis are performed. The NEX exam frequently uses images or descriptions to assess whether students can correctly distinguish between cocci, bacilli, spirilla/spirochetes, and vibrios based on visual characteristics. Recognizing bacilli as rod-shaped bacteria is a key foundational concept.
NEW QUESTION # 22
Solve for y and round to the nearest tenth.
- A. 24.1
- B. 24.3
- C. 34.0
- D. 24.5
Answer: B
Explanation:
This equation involves a mixed number and rounding. First convert the mixed numberinto a decimal. Five divided by eight equals 0.625, so the mixed number becomes 2.625. The equation now reads:
2.625y + 0.25 = 64.
Subtract 0.25 from both sides to isolate the term with y:
2.625y = 63.75.
Next, divide both sides by 2.625:
y # 24.2857.
The question asks for the answer rounded to the nearest tenth. Rounding 24.2857 gives 24.3. Therefore, option A is correct. NEX math questions frequently combine fractions, decimals, and rounding, so converting to decimals early helps reduce errors.
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NEW QUESTION # 23
Which action is an example of inequity in healthcare?
- A. Providing flexible or extended healthcare appointment times
- B. Distributing free school lunches to all students
- C. Filtering water for one segment of the community, but not another
- D. Administering medication to all patients who report pain
Answer: C
Explanation:
Healthcare inequity occurs when certain groups receive fewer resources or lower-quality care than others.
Filtering water for only one segment of a community creates unequal access to a basic health necessity, increasing health risks for those excluded. The other options promote fairness and equal access to care. The NEX Science exam often evaluates understanding of social determinants of health and ethical principles, making option C the clearest example of inequity.
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NEW QUESTION # 24
A red flower (RR) and a white flower (WW) were cross-pollinated. The result was four pink flowers (RW).
This is best explained by
- A. codominance
- B. non-disjunction
- C. multiple alleles
- D. mutation
Answer: A
Explanation:
Codominance occurs when two different alleles are both expressed in a heterozygous organism. In this case, the red and white alleles combine to produce an intermediate pink phenotype. Non-disjunction refers to chromosome separation errors, multiple alleles involve more than two allele types, and mutations involve DNA changes. The NEX Science exam frequently tests inheritance patterns, including codominance and incomplete dominance.
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NEW QUESTION # 25
When an individual sustains a torn ligament, the connection between which two structures is disrupted?
- A. Bone to artery
- B. Bone to bone
- C. Muscle to nerve
- D. Muscle to bone
Answer: B
Explanation:
Ligaments are strong bands of connective tissue that connect bone to bone at joints. Their primary function is to stabilize joints and prevent excessive movement. When a ligament is torn, the connection between two bones is disrupted, leading to joint instability. Tendons, not ligaments, connect muscle to bone. Nerves transmit electrical signals, and arteries transport blood. The NEX Science exam frequently includes musculoskeletal system questions that require distinguishing between ligaments and tendons, making bone-to- bone the correct answer.
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NEW QUESTION # 26
A student is traveling out of the United States to visit family living in Europe. The room booked for the trip costs €120.00 per night.
Given that $1.00 (US dollar) is equal to €1.2, how much will it cost per night in US Dollars?
- A. $120.01
- B. $100.00
- C. $144.00
- D. $120.00
Answer: B
Explanation:
This problem involves currency conversion. The exchange rate states that $1 equals €1.2. To convert euros to dollars, divide the euro amount by 1.2. Set up the calculation: €120 ÷ 1.2 = $100. Therefore, the cost per night in US dollars is $100. Option C is correct. Option B incorrectly multiplies instead of dividing. Options A and D fail to account for the exchange rate. NEX math problems involving currency emphasize understanding the direction of conversion and selecting the correct operation.
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NEW QUESTION # 27
Word Knowledge
The word"abundant"most nearly means:
- A. Fragile
- B. Scarce
- C. Plentiful
- D. Limited
Answer: C
Explanation:
"Abundant" means existing in large quantities or more than enough. Option B, "plentiful," is the closest synonym. Scarce and limited are opposites, and fragile refers to being easily broken. NEX word knowledge questions focus on synonyms used in common academic and healthcare contexts.
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NEW QUESTION # 28
Review the scatter plot of hours students studied for a test and their results.
What can you conclude from the graph?
- A. As hours studied increase, test scores tend to decrease.
- B. There is no relationship between hours studied and test scores.
- C. Test scores are higher when no hours are spent studying.
- D. As hours studied increase, test scores tend to increase.
Answer: D
Explanation:
This question tests interpretation of scatter plots and correlation. In the graph, the horizontal axis represents hours studied, and the vertical axis represents test scores. As the points move from left to right (indicating more hours studied), the points also tend to move upward (indicating higher test scores). This shows a positive relationship between the two variables. While not every point follows a perfect line, the overall trend clearly indicates that students who studied more hours generally achieved higher test scores. Option B correctly describes this positive correlation. Option A is incorrect because scores are not highest when no studying occurs. Option C is incorrect because there is a visible relationship. Option D describes a negative relationship, which is not shown. On the NEX exam, scatter plots are often used to test understanding of trends rather than exact values, so identifying the overall direction of the data is key.
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NEW QUESTION # 29
Veins throughout the body contain structures, indicated by arrows, in the image below.
The structures shown in the image prevent which of the following from occurring?
- A. Backflow of blood
- B. Forward flow of blood
- C. Obstruction of blood flow
- D. Blood leaking into the interstitial spaces
Answer: A
Explanation:
This question focuses on cardiovascular anatomy and physiology. Veins contain one-way valves that are especially important in the limbs, where blood must travel against gravity to return to the heart. These valves open to allow blood to move toward the heart and close to prevent blood from flowing backward. The structures indicated by the arrows in the image represent venous valves. Without these valves, blood could pool in the veins, leading to conditions such as varicose veins. Forward flow of blood is promoted, not prevented, by these valves. They do not obstruct blood flow under normal conditions, nor do they prevent blood from leaking into tissues-that function is related to capillary structure. The NEX Science exam frequently tests the functional significance of anatomical structures, and recognizing that venous valves prevent backflow of blood is a key cardiovascular concept.
NEW QUESTION # 30
The polar covalent bond of a water molecule (H#O) is shown in the image.
Which example demonstrates that water has polarity?
- A. A magnet dropped in water sinks more slowly than a rock of the same size and weight.
- B. When paddling through a stream, a kayaker uses the paddle to pull themselves through the water.
- C. When water is poured into a container with oil, the water molecules stick together, keeping the water and oil separated.
- D. Rainwater collects in the lowest places to form puddles.
Answer: C
Explanation:
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.
NEW QUESTION # 31
Word Knowledge
The word"monitor"most nearly means:
- A. Ignore
- B. Replace
- C. Supervise or observe
- D. Repair
Answer: C
Explanation:
Monitor means to watch, observe, or check regularly. Option A best matches this meaning. Monitoring is a common healthcare term.
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NEW QUESTION # 32
Reading Comprehension
Passage:
Antibiotics are effective against bacterial infections but do not work against viruses. Misuse of antibiotics can contribute to antibiotic resistance, making infections harder to treat.
What is the primary purpose of the passage?
- A. To promote antibiotic use for all illnesses
- B. To explain how viruses reproduce
- C. To describe immune system disorders
- D. To inform about proper antibiotic use
Answer: D
Explanation:
The passage explains what antibiotics treat, what they do not treat, and the consequences of misuse. Its purpose is informational, focusing on responsible use to prevent resistance. Option C best captures this purpose. The other options either misrepresent or ignore the main focus. Purpose questions on the NEX often test whether the reader understandswhythe passage was written.
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NEW QUESTION # 33
An acid needs to be diluted at a ratio of 5 grams of acid per 3 liters of water. How many grams of acid are needed for a solution of 24 liters of water to maintain the ratio?
- A. 40 grams
- B. 1.6 grams
- C. 14.4 grams
- D. 360 grams
Answer: A
Explanation:
This is a ratio and proportion problem. The given ratio is 5 grams of acid for every 3 liters of water. First determine how many groups of 3 liters are in 24 liters: 24 ÷ 3 = 8. Each group requires 5 grams of acid, so multiply: 8 × 5 = 40 grams. Therefore, option C is correct. Option D results from dividing instead of multiplying. Option B is excessively large and unrealistic. Ratio problems on the NEX require identifying the scaling factor before multiplying.
NEW QUESTION # 34
Reading Comprehension
Passage:
Exercise increases heart rate and improves circulation. Over time, regular physical activity strengthens the heart muscle and increases endurance.
Which effect of exercise is described in the passage?
- A. Strengthened heart muscle
- B. Increased flexibility
- C. Reduced appetite
- D. Improved digestion
Answer: A
Explanation:
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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NEW QUESTION # 35
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