Nursing Elites

1. Which of the following structures is the natural pacemaker of the heart?

• A. Sinoatrial node
• B. Submental node
• C. Atrioventricular node
• D. Scalene node

Correct answer: A

Rationale: The sinoatrial (SA) node is often referred to as the natural pacemaker of the heart because it is a group of cells located in the right atrium responsible for initiating the electrical signals that coordinate the heart's contractions. The SA node sets the rate and rhythm of the heartbeats, making it a crucial component in the heart's function. The other options, Submental node, Atrioventricular node, and Scalene node, are not related to the regulation of the heart's electrical activity. The Submental node is a lymph node located under the chin, the Atrioventricular node is responsible for passing electrical signals from the atria to the ventricles, and the Scalene node does not exist in the context of the heart's electrical system.

2. Which of the following is not an example given by the author of an element of the Western paradigm?

• A. Hero highly skilled at warfare
• B. Evil villain in black hat
• C. Everyone riding horses
• D. Community made up of upstanding citizens

Correct answer: C

Rationale: The author did not mention everyone riding horses as an element of the Western paradigm in the provided passage. The passage discusses the virtuous hero in the white hat, the evil villain in the black hat, and the community made up of upstanding citizens as elements of the Western paradigm. The hero being highly skilled at warfare and the community having morally upstanding citizens were also mentioned. Therefore, option C is the correct answer. Options A, B, and D are incorrect because they were all examples given by the author in the passage.

3. What is the fatty sheath that insulates some nerve fibers and speeds up signal transmission called?

• A. Myelin sheath
• B. Dura mater
• C. Pia mater
• D. Arachnoid mater

Correct answer: A

Rationale: The correct answer is A: Myelin sheath. The myelin sheath is a fatty layer that surrounds and insulates some nerve fibers, facilitating the rapid transmission of signals along the nerve fibers. Choices B, C, and D (Dura mater, Pia mater, and Arachnoid mater) are layers of the meninges, protective membranes that surround the brain and spinal cord. The primary function of the meninges is to protect and support the central nervous system, not to insulate nerve fibers for signal transmission.

4. During his study, Jenson finds himself increasingly drawn to information about the theaters of ancient Greece and particularly to the plays that the Greeks performed. What section of the library should he check next for more resources on the written plays that have survived from ancient Greece?

• A. 200
• B. 600
• C. 700
• D. 800

Correct answer: D

Rationale: Jenson should check section 800 for more resources on the written plays that have survived from ancient Greece. Section 800 generally covers literature and includes works of literary criticism, which would likely have information on ancient Greek plays, playwrights, and theatrical practices. Choice A (200) is for Religion, not related to ancient Greek plays. Choice B (600) is for Technical and applied science, unrelated to literature. Choice C (700) is for Arts and recreation, more related to the performing arts but not specifically focused on written plays from ancient Greece.

5. Elevation above sea level and temperature are negatively correlated variables. Which of the following statements describes the relationship between the variables?

• A. As elevation decreases, temperature remains the same
• B. As elevation decreases, temperature decreases
• C. As elevation increases, temperature decreases
• D. As elevation increases, temperature increases

Correct answer: C

Rationale: The correct answer is C: 'As elevation increases, temperature decreases.' In a negative correlation, the variables move in opposite directions. As elevation rises, temperature tends to decrease. Choice A is incorrect because a negative correlation implies that as one variable increases, the other decreases. Choices B and D are incorrect because they suggest that temperature either remains the same or increases as elevation decreases or increases, which is inconsistent with a negative correlation.

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