Nursing Elites

1. Which of the following hormones helps regulate blood pressure by affecting kidney function?

• A. Insulin
• B. Testosterone
• C. Renin
• D. Estrogen

Correct answer: C

Rationale: The correct answer is C: Renin. Renin is an enzyme produced by the kidneys that plays a crucial role in regulating blood pressure. Renin helps control blood pressure by initiating a series of reactions that ultimately lead to the production of angiotensin, a hormone that constricts blood vessels and increases blood pressure. Insulin is a hormone that regulates blood sugar levels, not blood pressure. Testosterone and estrogen are sex hormones that do not have a direct impact on kidney function or blood pressure regulation. Therefore, the correct hormone that helps regulate blood pressure by affecting kidney function is Renin.

2. A water fountain has a spherical base (diameter 50cm) and a cylindrical body (diameter 30cm, height 80cm) on top. What is the total surface area of the fountain (excluding the water surface)?

• A. 3142 sq cm
• B. 4712 sq cm
• C. 5486 sq cm
• D. 7957 sq cm

Correct answer: C

Rationale: Calculate the surface area of the sphere and the cylinder separately, then add them up.

3. Two experiments investigating the same phenomenon produce conflicting results. What is the most appropriate next step?

• A. Ignore the conflicting results and focus on the more convincing experiment.
• B. Conduct a combined experiment incorporating elements of both.
• C. Attack the methodology of the experiment with conflicting results.
• D. Accept the more recent experiment as definitively correct.

Correct answer: C

Rationale: When faced with conflicting results from two experiments, it is important to critically evaluate the methodology of both experiments. By examining the experimental design, variables controlled for, sample sizes, and potential sources of bias, one can better understand the reasons behind the discrepancies. Attacking the methodology of the experiment with conflicting results can help identify potential flaws or limitations that may explain the differences in outcomes. This approach allows for a more informed decision on how to proceed, rather than simply ignoring or accepting one set of results over the other.

4. What literary device is used in the line "The sea whispered secrets to the shore"?

• A. Alliteration
• B. Personification
• C. Onomatopoeia
• D. Hyperbole

Correct answer: B

Rationale: The sentence gives human qualities to the sea, like whispering, creating personification.

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 key difference lies in the control of the fission chain reaction. Reactors have controlled reactions for energy generation, while bombs have rapid, uncontrolled reactions creating explosions.

6. Balance the following redox reaction in acidic solution: I⁻ (aq) + Cr₂O₇²⁻ (aq) -> I₂ (aq) + Cr³⁺ (aq). Identify the oxidizing agent and reducing agent.

• A. I⁻ is oxidized, Crâ‚‚O₇²⁻ is reduced
• B. I⁻ is reduced, Crâ‚‚O₇²⁻ is oxidized.
• C. Both I⁻ and Crâ‚‚O₇²⁻ are oxidized.
• D. Both I⁻ and Crâ‚‚O₇²⁻ are reduced.

Correct answer: A

Rationale: . I⁻ loses an electron (oxidation), Cr₂O₇²⁻ gains electrons (reduction).

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