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| Section | Weight | Objectives |
|---|---|---|
| Science | 38% | - Chemistry
|
| Verbal Ability | 34% | - Word Knowledge
|
| Mathematics | 28% | - Algebra
|
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NEW QUESTION # 106
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?
Answer: D
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 # 107
Reading Comprehension
Passage:
Sleep deprivation can impair immune function, making individuals more susceptible to illness. Over time, chronic lack of sleep may increase the risk of serious health conditions.
Which statement is best supported by the passage?
Answer: A
Explanation:
The passage states that lack of sleep weakens immune function and increases susceptibility to illness. This supports the conclusion that adequate sleep supports immune health. Option C accurately reflects this relationship. Options A and D contradict the passage, while option B exaggerates the effect. NEX questions often test the ability to infer logical conclusions without overgeneralizing.
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NEW QUESTION # 108
There are four drinks on sale:
* 20 ounce cup for $4.00
* 12 ounce cup for $3.00
* 10 ounce cup for $2.50
* 8 ounce cup for $2.40
Which drink is the most expensive price per ounce?
Answer: A
Explanation:
This question tests unit rate comparison, which is common on the NEX exam. To find the price per ounce, divide the cost by the number of ounces for each drink. For the 20-ounce cup: $4.00 ÷ 20 = $0.20 per ounce.
For the 12-ounce cup: $3.00 ÷ 12 = $0.25 per ounce. For the 10-ounce cup: $2.50 ÷ 10 = $0.25 per ounce. For the 8-ounce cup: $2.40 ÷ 8 = $0.30 per ounce. The most expensive price per ounce is $0.30, which corresponds to the 8-ounce cup. Therefore, option B is correct. The NEX frequently includes comparison problems that require calculating unit rates rather than comparing total prices. Always divide cost by quantity to ensure an accurate comparison.
NEW QUESTION # 109
The weight, in pounds (lb), of 8 infants is listed below:
8.5 lb, 11 lb, 7 lb, 5 lb, 7 lb, 4.5 lb, 9 lb, 8 lb
What is the mean weight of these infants?
Answer: B
Explanation:
This question tests calculation of the mean. First, add all the infant weights:
8.5 + 11 + 7 + 5 + 7 + 4.5 + 9 + 8 = 60 pounds.
Next, divide the total by the number of infants: 60 ÷ 8 = 7.5? Recheck carefully: 60 ÷ 8 = 7.5, but reviewing the answer choices and recalculating the sum more carefully:
8.5 + 11 = 19.5
19.5 + 7 = 26.5
26.5 + 5 = 31.5
31.5 + 7 = 38.5
38.5 + 4.5 = 43
43 + 9 = 52
52 + 8 = 60
60 ÷ 8 = 7.5, which corresponds to option C.
NEW QUESTION # 110
A healthcare provider recommends that a patient take 200 milligrams (mg) of a pain reliever every 4 hours.
How many grams of the pain reliever should the patient have taken after 8 hours if the recommendation was followed?
(Given 1,000 mg = 1 gram.)
Answer: A
Explanation:
This is a medication dosage problem, a critical area on the NEX exam. First determine how many doses are taken in 8 hours. Since the medication is taken every 4 hours, the patient takes 8 ÷ 4 = 2 doses. Each dose is
200 mg, so the total amount taken is 200 × 2 = 400 mg. Next convert milligrams to grams using the given conversion: 1,000 mg equals 1 gram. Divide 400 ÷ 1,000 = 0.4 grams. Therefore, the correct answer is D.
Option B represents only one dose. Options A and C are dangerously large and result from incorrect placement of the decimal. The NEX frequently tests safe dosage calculations, so careful unit conversion is essential.
NEW QUESTION # 111
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