Nursing Elites

1. Which of the following demonstrates correct punctuation of a quotation?

• A. "You should have never invited Shane to that party," said Jessica, "if you didn't want him to run into Blayne."
• B. "You should have never invited Shane to that party," said Jessica. "If you didn't want him to run into Blayne."
• C. "You should have never invited Shane to that party," said Jessica, "if you didn't want him to run into Blayne."
• D. "You should have never invited Shane to that party," said Jessica, "If you didn't want him to run into Blayne."

Correct answer: A

Rationale: Choice A is the correct answer as it demonstrates the correct punctuation of a quotation. In this sentence, the comma is correctly placed inside the quotation marks after 'party' and 'Blayne.' This follows the standard rule in punctuation where commas and periods should always be placed inside the closing quotation mark. Choices B, C, and D are incorrect. Choice B incorrectly places a period before the closing quotation mark after 'Jessica,' which is not necessary. Choice C misses a comma inside the quotation marks after 'party,' leading to incorrect punctuation. Choice D incorrectly capitalizes 'If' within the quotation, which is not part of the original sentence.

2. What are the tiny contractile units within muscle cells called?

• A. Myocytes
• B. Myofibrils
• C. Sarcomeres
• D. Tendons

Correct answer: C

Rationale: Sarcomeres are the smallest contractile units within muscle cells. They consist of overlapping filaments of actin and myosin proteins, which interact to produce muscle contractions. Myocytes are the entire muscle cells, myofibrils are bundles of protein filaments found within muscle cells, and tendons are tough connective tissues that connect muscles to bones. Therefore, sarcomeres specifically represent the contractile units responsible for muscle contraction, making them the correct answer in this context.

3. What is the primary function of the spleen, an organ associated with the lymphatic system?

• A. Regulating blood sugar levels
• B. Filtering blood and destroying old red blood cells
• C. Producing digestive enzymes
• D. Secreting hormones

Correct answer: B

Rationale: The spleen is primarily responsible for filtering blood and destroying old or damaged red blood cells. It also aids in storing blood and producing specific types of white blood cells, contributing to maintaining blood quality and immune system function. Choices A, C, and D are incorrect because the spleen is not involved in regulating blood sugar levels, producing digestive enzymes, or secreting hormones. These functions are carried out by other organs in the body.

4. Which of the following is an example of an aromatic hydrocarbon?

• A. Ethane
• B. Benzene
• C. Propane
• D. Butene

Correct answer: B

Rationale: Benzene is indeed an example of an aromatic hydrocarbon. Aromatic hydrocarbons are characterized by having a cyclic structure with alternating single and double bonds (pi bonds). Benzene fits this description, making it aromatic. On the other hand, ethane, propane, and butene are aliphatic hydrocarbons, which do not have the distinct cyclic structure of aromatic hydrocarbons. Ethane, propane, and butene are aliphatic hydrocarbons, which contain only single bonds and are not cyclic in nature. Therefore, they are not examples of aromatic hydrocarbons.

5. Melatonin is a hormone produced by the pineal gland. What is its primary function?

• A. Regulate blood pressure
• B. Stimulate the digestive system
• C. Control sleep-wake cycles
• D. Maintain bone density

Correct answer: C

Rationale: Melatonin is primarily known for its role in controlling sleep-wake cycles. It is produced by the pineal gland in response to darkness, helping signal the body that it is time to sleep. Melatonin levels typically rise in the evening and stay elevated throughout the night, promoting sleep. Choices A, B, and D are incorrect as melatonin's primary function is not to regulate blood pressure, stimulate the digestive system, or maintain bone density. While melatonin may have some indirect effects on these functions, its main role lies in regulating the circadian rhythm and promoting a restful sleep cycle.

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