Nursing Elites

1. Which of the following is the intricate network of blood vessels responsible for transporting blood throughout the body?

• A. Lymphatic system
• B. Circulatory system
• C. Nervous system
• D. Respiratory system

Correct answer: B

Rationale: The circulatory system, comprising the heart, blood vessels (arteries, veins, and capillaries), and blood, is responsible for transporting blood, oxygen, nutrients, and waste products throughout the body. The lymphatic system aids in maintaining fluid balance and fighting infections; the nervous system transmits signals. The respiratory system facilitates the exchange of oxygen and carbon dioxide in the body, which is distinct from the circulatory system's role in blood transport. Therefore, the correct answer is the Circulatory system (Choice B). Choices A, C, and D are incorrect as they do not pertain to the intricate network of blood vessels responsible for transporting blood throughout the body.

2. As used in the passage, what does the word 'depressed' most nearly mean?

• A. Very unhappy
• B. Decreased appreciably
• C. Exhaled hard
• D. Pushed down

Correct answer: D

Rationale: In this context, 'depressed' means 'pushed down' as it refers to the action of pushing down the plunger to force out the clog in the pipe. The word 'depressed' is used to describe the physical action of pressing down, not to convey emotions like being very unhappy (choice A), to decrease appreciably (choice B), or to exhale hard (choice C), making these choices incorrect.

3. What do Newton's rings visually demonstrate?

• A. Diffraction
• B. Doppler effect
• C. Polarization
• D. Thin-film interference

Correct answer: D

Rationale: Newton's rings are a series of concentric colored rings observed when light is reflected between a spherical surface and a flat surface. This phenomenon is a result of thin-film interference, where light waves reflecting off the two surfaces interfere with each other constructively or destructively, leading to the observed pattern of rings. Diffraction, polarization, and the Doppler effect are not related to the specific phenomenon of Newton's rings. Diffraction refers to the bending of waves around obstacles, polarization deals with the orientation of electromagnetic waves, and the Doppler effect relates to the change in frequency of waves due to motion. Therefore, the correct answer is thin-film interference, as it precisely describes the phenomenon observed in Newton's rings.

4. Why did Julia not return to work after the alarm?

• A. She was embarrassed that she could not finish the work her boss asked for.
• B. She was tired and wanted to go home.
• C. She got stuck in traffic and could not get back to her office.
• D. Her boss gave her the afternoon off.

Correct answer: C

Rationale: The most likely reason Julia did not return to work after the alarm is that she got stuck in traffic and could not get back to her office. The extract provides details about Julia's challenging morning, starting from being woken up early by lawn mowers, having a caffeine-free cup of coffee, facing traffic delays, arriving late at work, and receiving additional work from her boss. These events culminated in Julia deciding to leave after the fire alarm, indicating that being stuck in traffic was the primary reason for her absence. Choices A, B, and D are incorrect because there is no direct evidence in the provided extract to support them. Julia's actions suggest that her decision to leave was more related to external factors like traffic issues rather than internal feelings of embarrassment, tiredness, or being given time off by her boss.

5. The average life expectancy at birth in the United States at the beginning of the 21st century was about 75 years. The average life expectancy at birth in the middle of the 19th century was only about 40 years. Which of the following factors are likely to have contributed to the longer life expectancy in the 21st century? (Select the one that does not apply)

• A. The human body has evolved to become more resilient to its environment.
• B. There have been numerous advances in medical technology and treatments.
• C. Higher standards of basic cleanliness have helped people avoid illness.
• D. The creation of vaccines has nearly eliminated certain diseases that were once deadly.

Correct answer: A

Rationale: Medical advances, higher standards of cleanliness, and the creation of vaccines have all significantly contributed to the increase in life expectancy over time. While human evolution plays a role in adaptation to the environment over millennia, it is not a primary factor that has led to the substantial increase in life expectancy within a few centuries. The human body's evolution is a slow process that occurs over generations, while the advancements in medical technology, cleanliness, and vaccines have had a more immediate and direct impact on improving life expectancy.

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