Nursing Elites

1. Positron emission tomography (PET) scans utilize a key property of positrons for medical imaging. What is this property?

• A. High mass
• B. Positive charge
• C. Extreme stability
• D. Identical behavior to electrons

Correct answer: B

Rationale: Positron emission tomography (PET) scans utilize the property of positrons having a positive charge. Positrons are the antimatter counterpart of electrons, having the same mass but opposite charge. When a positron collides with an electron, they annihilate each other, producing gamma rays that can be detected by the PET scanner to create images of the body's internal structures and functions. Choice A is incorrect because positrons have the same mass as electrons. Choice C is incorrect as positrons are not extremely stable due to their tendency to annihilate when they encounter electrons. Choice D is incorrect as positrons exhibit different behavior than electrons due to their opposite charges.

2. Endotoxins are toxic substances released by:

• A. Viruses
• B. Bacteria (gram-positive)
• C. Bacteria (gram-negative)
• D. Parasites

Correct answer: C

Rationale: Endotoxins are toxic substances that are part of the outer membrane of the cell wall of gram-negative bacteria. These toxins are released when the bacteria are destroyed or during bacterial growth. Endotoxins can cause a variety of harmful effects in the host, including fever, inflammation, and septic shock. Viruses do not produce endotoxins; they are typically associated with producing viral proteins that can be toxic to host cells. Gram-positive bacteria produce exotoxins, which are different from endotoxins found in gram-negative bacteria. Parasites, though capable of causing diseases, are not typically associated with the production of endotoxins.

3. The American Academy of Arts and Sciences includes members whose topics of study span many disciplines such as math, science, arts, humanities, public affairs, and business. Which of the following is an appropriate synonym for disciplines as it is used in the sentence?

• A. locations
• B. regions
• C. punishments
• D. fields

Correct answer: D

Rationale: In this context, 'disciplines' refers to specific areas of study or fields of expertise. Therefore, the most appropriate synonym for 'disciplines' would be 'fields.' Options A, B, and C do not accurately convey the meaning of 'disciplines' in the given sentence. 'Locations' and 'regions' refer to physical places, while 'punishments' is entirely unrelated to the context of academic or professional fields of study.

4. In the sentence 'Singing is my favorite activity,' how does 'Singing' function in terms of parts of speech?

• A. Verb
• B. Noun
• C. Adjective
• D. Pronoun

Correct answer: B

Rationale: In the sentence provided, 'Singing' is a gerund, which is a verb form ending in -ing that functions as a noun. It represents the action of singing, but in this context, it acts as the subject of the sentence. Therefore, 'Noun' is the correct answer. 'Verb' (choice A) is incorrect because while gerunds are verb forms, in this sentence, 'Singing' is not acting as a verb. 'Adjective' (choice C) is incorrect as it describes a noun, which is not the case here. 'Pronoun' (choice D) is also incorrect as 'Singing' does not replace a noun in this sentence.

5. The speaker addresses his audience as 'My Good Friends.' What kind of credibility does this salutation give to the speaker?

• A. The speaker's salutation is one from an employer to his employees, aiming to bridge the gap between them.
• B. The speaker's salutation is one from an entertainer to his audience, using friendly language to connect before a serious speech.
• C. The salutation gives the serious speech that follows a somber tone, as it is used ironically.
• D. The speech is from a politician to the public, using the salutation to grab the audience's attention.

Correct answer: B

Rationale: The salutation 'My Good Friends' used by Charles Dickens in his speech to the working men and their families in Birmingham shows that he is addressing them as an entertainer, aiming to connect with them before delivering a serious message. This friendly language establishes a personal connection with the audience, setting a tone of camaraderie and warmth. The salutation is not meant to bridge a gap between an employer and employees (Choice A), create irony (Choice C), or grab attention like a politician (Choice D). Instead, it is a genuine and warm address to engage the audience before conveying his earnest hope about the Institute's principles.

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