Nursing Elites

1. What is the main function of the urinary system?

• A. Transporting oxygen
• B. Fighting off infections
• C. Maintaining acid-base balance
• D. All of the above

Correct answer: C

Rationale: The main function of the urinary system is to maintain the body's acid-base balance. This is achieved by regulating the levels of electrolytes and water in the body. The kidneys filter waste products from the blood to form urine, which helps to regulate the pH balance. Choice A, transporting oxygen, is primarily the function of the respiratory system. Choice B, fighting off infections, is a function of the immune system. Therefore, the correct answer is maintaining acid-base balance.

2. He also took part in the community police supervision project. He played an instrumental role in the BPP breakfast program for impoverished African American children. Which revision best combines these sentences for clarity and flow?

• A. NO CHANGE
• B. He also took part in the community police supervision project but played an instrumental role
• C. He also took part in the community police supervision project, he played an instrumental role
• D. He also took part in the community police supervision project and played an instrumental role

Correct answer: D

Rationale: The correct answer is 'D' because the phrase 'and played an instrumental role' provides a smoother transition between the two ideas. In this context, using 'and' helps to connect the two activities more effectively. Choice 'B' introduces a contrasting conjunction 'but,' which is not suitable in this context where the actions are related. Choice 'C' incorrectly separates the two actions into distinct sentences, affecting the flow and coherence of the paragraph. Therefore, 'D' is the best choice for combining the sentences for clarity and flow.

3. Which of the following sets of valves is primarily responsible for preventing blood flow from major blood vessels to the heart?

• A. atrioventricular valves
• B. semilunar valves
• C. tricuspid valves
• D. bicuspid valves

Correct answer: B

Rationale: The correct answer is B: semilunar valves. Semilunar valves are primarily responsible for preventing blood flow from major blood vessels to the heart. These valves are located at the base of the aorta and the pulmonary artery, ensuring blood flows in one direction only by closing when the ventricles relax to prevent blood from flowing back into the heart. Choices A, C, and D are incorrect. Atrioventricular valves (choice A) include the tricuspid and bicuspid valves, which prevent backflow between the atria and ventricles, not major blood vessels. Tricuspid valves (choice C) and bicuspid valves (choice D) are specific types of atrioventricular valves located between the atria and ventricles, not at the base of major blood vessels.

4. What is the correct order for the following sentence: 'yesterday she went to the store'?

• A. She went to the store yesterday.
• B. To the store she went yesterday.
• C. Yesterday to the store she went.
• D. She yesterday went to the store.

Correct answer: A

Rationale: The correct order for the sentence 'yesterday she went to the store' is 'She went to the store yesterday.' In English, the standard word order for a sentence is subject-verb-object-adverbial (time). Choice A is the correct answer as it follows this standard order. Choice B changes the order of the subject and object. Choice C changes the order of the adverbial and subject. Choice D changes the order of the subject and adverbial. Therefore, choices B, C, and D are incorrect.

5. A container holds 10 liters of water. If 25% of the water is used, how many liters are left?

• A. 7.5 liters
• B. 8 liters
• C. 6.5 liters
• D. 8.5 liters

Correct answer: A

Rationale: To find the amount of water left after 25% is used, you need to calculate 75% of the total water. 75% of 10 liters is 7.5 liters, which means that 7.5 liters of water are left. Therefore, the correct answer is A. Choice B (8 liters) is incorrect because this would be the total water remaining if 20% was used, not 25%. Choice C (6.5 liters) is incorrect as it does not account for the correct percentage of water left. Choice D (8.5 liters) is incorrect as it miscalculates the amount of water remaining after 25% is used.

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