Nursing Elites

1. What is the primary function of the respiratory system?

• A. Maintain body temperature
• B. Deliver oxygen to the bloodstream and remove carbon dioxide
• C. Produce antibodies for the immune system
• D. Break down food molecules for energy

Correct answer: B

Rationale: The primary function of the respiratory system is to deliver oxygen to the bloodstream and remove carbon dioxide. This process occurs through breathing, where oxygen is inhaled into the lungs and then transferred to the bloodstream, while carbon dioxide is removed from the bloodstream and exhaled out of the body. Maintaining body temperature (A), producing antibodies for the immune system (C), and breaking down food molecules for energy (D) are functions of other systems in the body, not the respiratory system. Therefore, the correct answer is B.

2. Which of the following describes a scalar quantity?

• A. Velocity
• B. Acceleration
• C. Force
• D. Speed

Correct answer: D

Rationale: A scalar quantity is a physical quantity that has magnitude only, without any direction. Speed is an example of a scalar quantity because it only describes how fast an object is moving without specifying the direction of motion. Velocity, acceleration, and force are vector quantities because they have both magnitude and direction. Therefore, the correct answer is 'Speed.' Choices A, B, and C are incorrect because velocity, acceleration, and force are all vector quantities that involve both magnitude and direction.

3. What is the name of a condition where the heart rate is 118 beats per minute (bpm)?

• A. Tachycardia
• B. Apnea
• C. Bradycardia
• D. Tachypnea

Correct answer: A

Rationale: The correct answer is A: Tachycardia. Tachycardia is a condition characterized by a heart rate that exceeds the normal resting rate, typically above 100 bpm. In this case, a heart rate of 118 bpm falls within the range of tachycardia. Apnea (choice B) refers to the temporary cessation of breathing, not related to heart rate. Bradycardia (choice C) is a condition of an abnormally slow heart rate, opposite of the given heart rate. Tachypnea (choice D) is an abnormally rapid breathing rate, not related to heart rate.

4. Which choice correctly matches these samples with incompletely met criteria?

• A. Sample 1's evidence is not sufficient; sample 2's evidence is not relevant; sample 3's evidence is not factual.
• B. Sample 1's evidence is not factual; sample 2's evidence is not sufficient; sample 3's evidence is not relevant.
• C. Sample 1's evidence is not relevant; sample 2's evidence is not factual; sample 3's evidence is not sufficient.
• D. The evidence of samples 1 and 3 is insufficient; sample 2's evidence is factual but irrelevant.

Correct answer: C

Rationale: Choice C correctly matches the samples with incompletely met criteria. It states that sample 1's evidence is not relevant, sample 2's evidence is not factual, and sample 3's evidence is not sufficient. This aligns with the criteria mentioned, indicating a lack of relevance, factual accuracy, and sufficiency in each sample, respectively. Choices A, B, and D do not accurately match the samples with the given criteria, making them incorrect. In choice A, while sample 1's evidence is not sufficient, sample 2's evidence is not relevant, and sample 3's evidence is not factual, the order in which these aspects are mentioned is not aligned with the criteria provided. Choice B has the correct order but mismatches the criteria with the samples. Choice D incorrectly assesses the evidence of the samples, focusing on sufficiency and relevance but not aligning with the specified criteria for each sample.

5. What is the main difference between a nuclear reactor and a nuclear bomb?

• A. Reactors use enriched uranium, while bombs use natural uranium.
• B. Reactors have controlled chain reactions, while bombs have uncontrolled chain reactions.
• C. Reactors generate electricity, while bombs cause explosions.
• D. Reactors use moderators, while bombs don't.

Correct answer: B

Rationale: The main difference between a nuclear reactor and a nuclear bomb is that reactors have controlled chain reactions, while bombs have uncontrolled chain reactions. Nuclear reactors are designed to sustain a controlled nuclear reaction to generate electricity. In contrast, nuclear bombs are designed to release a massive amount of energy in an uncontrolled chain reaction, resulting in an explosion. Choice A is incorrect because both reactors and bombs can use enriched uranium. Choice C is incorrect as nuclear reactors also generate electricity, not just bombs. Choice D is incorrect because both reactors and bombs may or may not use moderators, but the key distinction lies in the control of the chain reaction.

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