Nursing Elites

1. What is the most powerful stimulus for breathing in a healthy person?

• A. Acidosis
• B. Alkalosis
• C. Increase in CO2
• D. Loss of O2

Correct answer: C

Rationale: The correct answer is an increase in CO2. In a healthy individual, the primary drive to breathe is regulated by the levels of carbon dioxide (CO2) in the blood. When CO2 levels increase, it triggers the body to increase the rate and depth of breathing to eliminate excess CO2 and restore the balance. This response is more powerful than other stimuli such as acidosis, alkalosis, or loss of oxygen. While acidosis and alkalosis can affect breathing, an increase in CO2 has a more direct and immediate impact. Loss of oxygen (hypoxia) is a potent stimulus, but the body's response to increased CO2 levels is generally more pronounced and immediate in healthy individuals.

2. Which statement is not a detail from the passage?

• A. Promoters of dietary supplements can make any claims that are supported by research.
• B. GMP requirements for large manufacturers went into effect in 2008.
• C. The FDA regulates dietary supplements in the same way as prescription medications.
• D. Consumers should research supplement claims before making a purchase.

Correct answer: A

Rationale: The statement "Promoters of dietary supplements can make any claims that are supported by research" is not a detail from the passage. The passage mentions that manufacturers, not promoters, can make claims supported by research. The primary focus is on the regulations and manufacturing standards for dietary supplements. Choice B is a detail from the passage as it mentions the GMP requirements for large manufacturers going into effect in 2008. Choice C is incorrect as the passage states that FDA regulations for dietary supplements are not the same as those for prescription medications. Choice D is also supported by the passage, emphasizing that consumers should research supplement claims before making a purchase to ensure accuracy and safety.

3. What kinds of clauses does the following sentence contain? "Although Ted had an impressive education, he had little experience working with individuals, which made him less effective at relating to them."

• A. Two dependent clauses and one independent clause
• B. One dependent clause and two independent clauses
• C. Two independent clauses and no dependent clauses
• D. One dependent clause and one independent clause

Correct answer: B

Rationale: The sentence consists of one dependent clause, 'Although Ted had an impressive education,' which introduces a condition. It also contains two independent clauses: 'he had little experience working with individuals,' which presents a fact, and 'which made him less effective at relating to them,' which provides additional information. Therefore, the correct answer is B. Choice A is incorrect because it incorrectly identifies the number of independent and dependent clauses. Choice C is incorrect as it wrongly states that there are no dependent clauses in the sentence. Choice D is incorrect as it does not accurately represent the structure of the sentence.

4. What is the difference between DNA and RNA?

• A. Both are double-stranded.
• B. DNA contains deoxyribose sugar, while RNA contains ribose sugar.
• C. RNA contains the nitrogenous base uracil, while DNA contains thymine.
• D. Both are identical molecules.

Correct answer: B

Rationale: A) Incorrect. DNA is double-stranded, but RNA is typically single-stranded. B) Correct. DNA contains deoxyribose sugar, which lacks an oxygen atom on the 2' carbon of the sugar ring, while RNA contains ribose sugar, which has an additional hydroxyl group on the 2' carbon. C) Incorrect. RNA contains the nitrogenous base uracil, while DNA contains thymine. D) Incorrect. DNA and RNA have distinct structures and functions, so they are not identical molecules.

5. What type of molecule forms the cell membrane and controls what enters and exits the cell?

• A. Proteins
• B. Carbohydrates
• C. Lipids
• D. Nucleic acids

Correct answer: C

Rationale: The cell membrane is primarily composed of lipids, specifically phospholipids, which form a lipid bilayer. This lipid bilayer controls what enters and exits the cell, providing a barrier that is selectively permeable. While proteins are also important components of the cell membrane and play various roles, lipids are the main structural component responsible for the membrane's permeability and function. Carbohydrates and nucleic acids are not the primary components of the cell membrane and do not have the same structural role as lipids.

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