Nursing Elites

1. Which statement is not listed as a detail within the passage?

• A. Changes in the ECG are typically used for the diagnosis of abnormal cardiac rhythm.
• B. The signal has a characteristic record called the electrocardiogram.
• C. The 'wave of excitation' starts at the SA node.
• D. The 'wave of excitation' spreads through the heart wall and is accompanied by electric changes.

Correct answer: A

Rationale: The corrected statement should be: Changes in the ECG are not typically used for the diagnosis of abnormal cardiac rhythm. The passage mentions that the heart sends out electric currents in waves, and the 'wave of excitation' spreads through the heart wall accompanied by electric changes. It details the process of how the heart's electric impulses are recorded and how abnormalities can be detected. However, it does not state that ECG changes are specifically used for diagnosing abnormal cardiac rhythms. Choice A is the correct answer because it misrepresents the information provided in the passage. Choices B, C, and D are all supported by the passage and align with the details mentioned regarding the electrocardiogram and the wave of excitation in the heart.

2. What is the main function of the lymphatic system?

• A. To transport oxygen
• B. To produce hormones
• C. To fight infections
• D. To transport nutrients

Correct answer: C

Rationale: The main function of the lymphatic system is to fight infections. It achieves this by filtering lymph, returning excess tissue fluid to the bloodstream, and aiding in the body's immune response. The lymphatic system is crucial in protecting the body against pathogens and maintaining overall health. Choices A, B, and D are incorrect because transporting oxygen, producing hormones, and transporting nutrients are functions performed by other systems in the body, like the respiratory, endocrine, and circulatory systems, respectively.

3. Which is a secondary defense for the body against pathogens?

• A. Tears
• B. Urine
• C. Inflammation
• D. Mucus

Correct answer: C

Rationale: Inflammation is a secondary defense mechanism for the body against pathogens. When tissues are injured or infected, inflammation occurs as a protective response involving increased blood flow, white blood cell migration, and tissue repair. This process helps contain and eliminate pathogens, preventing them from spreading further in the body. Tears (Choice A) are a primary defense containing lysozyme and other antimicrobial agents. Urine (Choice B) is typically considered a non-specific defense mechanism due to its flushing action in the urinary tract. Mucus (Choice D) acts as a physical barrier and traps pathogens, also considered a primary defense mechanism.

4. Fluids can be categorized based on their shear stress-strain rate relationship. An ideal fluid exhibits:

• A. Zero shear stress at any strain rate
• B. Linear relationship between shear stress and strain rate (Newtonian)
• C. Non-linear relationship between shear stress and strain rate (Non-Newtonian)
• D. High dependence of viscosity on temperature

Correct answer: A

Rationale: An ideal fluid, often referred to as an inviscid fluid, is a theoretical concept used in fluid mechanics to simplify calculations. It is characterized by having zero shear stress at any strain rate. In reality, such fluids do not exist, but they serve as a useful starting point for understanding fluid behavior in idealized situations. Choice B is incorrect because a linear relationship between shear stress and strain rate defines a Newtonian fluid, not an ideal fluid. Choice C is incorrect because a non-linear relationship between shear stress and strain rate characterizes Non-Newtonian fluids, not ideal fluids. Choice D is incorrect because the high dependence of viscosity on temperature is a characteristic seen in real fluids and does not define an ideal fluid.

5. What is implied by the article?

• A. Siam was renamed Thailand in the past
• B. The author dislikes parlor games
• C. Elephants are difficult to take care of and train
• D. White elephants were considered sacred and a burden to their recipients

Correct answer: A

Rationale: The correct answer is A. The article explicitly states that centuries ago, Siam, now known as Thailand, had the custom of giving white elephants as punishment. This implies that Siam was renamed Thailand in the past. The other choices (B, C, D) are not supported by the content of the article. Choice B is incorrect as the author does not express any dislike for parlor games. Choice C is incorrect as the article does not mention that elephants are easy or difficult to take care of and train. Choice D is incorrect as the article describes white elephants as sacred and a burden to their recipients, not as hard workers in the cane fields.

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