Nursing Elites

1. Which of the following equations does not represent a function?

• A. y = x^2
• B. y = sqrt(x)
• C. x = y^2
• D. y = 2x + 1

Correct answer: C

Rationale: An equation represents a function if each input (x-value) corresponds to exactly one output (y-value). In the equation x = y^2, for a single x-value, there are two possible y-values (positive and negative square root), violating the definition of a function. This violates the vertical line test, where a vertical line intersects the graph in more than one point for non-functions. Choices A, B, and D all pass the vertical line test and represent functions, making them incorrect answers.

2. What type of text includes the author's purpose, major ideas, supporting details, visual aids, and vocabulary as key elements?

• A. Fictional texts
• B. Persuasive texts
• C. Narratives
• D. Informational texts

Correct answer: D

Rationale: The key elements mentioned (author's purpose, major ideas, etc.) are typically associated with informational texts. Informational texts aim to inform and educate the reader, making use of these elements to convey factual information. Fictional texts focus more on storytelling, character development, and plot, while persuasive texts aim to convince or persuade the audience. Narratives are stories that can be fictional or non-fictional, emphasizing a sequence of events rather than the specific elements mentioned in the question.

3. It is December, and you have not yet had a lu vaccine. What should you do if you are among the people for whom a vaccine is recommended?

• A. Call your doctor for an appointment and get the vaccine.
• B. Avoid other people as much as possible.
• C. Wait until next year and get a double dose.
• D. Contact your local public health board to inform them.

Correct answer: A

Rationale: If you are among the people for whom a flu vaccine is recommended, the best course of action is to call your doctor for an appointment and get the vaccine. Getting vaccinated can help protect you from getting the flu and reduce the spread of the virus to others. It is important to prioritize your health and take preventive measures, especially during the flu season.

4. Which test is commonly used to assess kidney function?

• A. Complete blood count (CBC)
• B. Blood sugar test
• C. Urinalysis
• D. Creatinine clearance test

Correct answer: D

Rationale: The creatinine clearance test is commonly used to assess kidney function. Creatinine, a waste product produced by muscles, is filtered out of the blood by the kidneys. The creatinine clearance test measures how efficiently the kidneys clear creatinine from the blood. Abnormal levels of creatinine in the blood can indicate kidney dysfunction, making this test crucial for evaluating kidney function. Choice A, a complete blood count (CBC), provides information about different blood cells and is not a specific test for kidney function. Choice B, a blood sugar test, assesses glucose levels in the blood and is not directly related to kidney function. Choice C, a urinalysis, evaluates the contents of urine and can provide information about kidney health but is not as specific for assessing kidney function as the creatinine clearance test.

5. What is meant by the term 'goiter'?

• A. Overproduction of cortisol from the adrenal glands
• B. Excessive growth of the thyroid gland
• C. Underproduction of parathyroid hormone (PTH)
• D. Deficiency of growth hormone from the pituitary gland

Correct answer: B

Rationale: A goiter is a condition characterized by the abnormal enlargement of the thyroid gland. This enlargement can be caused by various factors such as iodine deficiency, thyroid nodules, inflammation, or other thyroid disorders. It is not associated with the overproduction of cortisol (Choice A), underproduction of parathyroid hormone (Choice C), or deficiency of growth hormone (Choice D). Therefore, the correct answer is B, excessive growth of the thyroid gland.

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