Nursing Elites

1. What property of a wave determines its speed in a given medium?

• A. Amplitude
• B. Wavelength
• C. Frequency
• D. Medium's properties

Correct answer: D

Rationale: The speed of a wave in a given medium is determined by the properties of that medium, such as its density and elasticity. While amplitude, wavelength, and frequency are important characteristics of a wave, they do not directly impact its speed in a specific medium. Amplitude refers to the maximum displacement of particles in a wave, wavelength is the distance between two successive points in a wave that are in phase, and frequency is the number of complete oscillations a wave makes in a given time. However, these properties do not dictate the speed of a wave in a particular medium. Therefore, the correct answer is the medium's properties.

2. The word 'cation' is closest in meaning to:

• A. element
• B. nutrient similar to magnesium
• C. symptom of deficiency
• D. nutritional supplement

Correct answer: A

Rationale: The word 'cation' refers to a positively charged ion, which is an atom or molecule that has lost one or more electrons. It is not related to nutrients, symptoms, or supplements. Therefore, the closest in meaning to 'cation' among the given choices is 'element.' In the provided extract, it mentions that cations like magnesium can affect the body's ability to absorb other cations, including calcium and potassium. This further emphasizes that 'cation' is related to elements rather than nutrients, symptoms, or supplements.

3. Which of the following is NOT a typical component of healthy semen?

• A. Sperm
• B. Fructose (sugar)
• C. Prostaglandins
• D. Urine

Correct answer: D

Rationale: Healthy semen is composed of sperm, fructose (sugar), and prostaglandins. Urine is not a typical component of semen. While semen is ejaculated during sexual activity, urine is expelled through a separate pathway in the male reproductive system. Therefore, the correct answer is 'Urine.' Choices A, B, and C are all components found in healthy semen.

4. What kind of error does the following sentence contain? Forgetting that he was supposed to meet his girlfriend for dinner, Anita was mad when Fred showed up late.

• A. Parallelism
• B. Run-on sentence
• C. Misplaced modifier
• D. Subject-verb agreement

Correct answer: C

Rationale: The correct answer is C, misplaced modifier. In this sentence, the modifier 'Forgetting that he was supposed to meet his girlfriend for dinner' is placed incorrectly, suggesting that Anita forgot, when it was actually Fred who forgot. The modifier should be positioned closer to 'Fred' to clarify the intended meaning. Choices A, B, and D are incorrect. Parallelism is not an issue in this sentence, it is not a run-on sentence as it is grammatically correct, and there is no subject-verb agreement error present.

5. Which statement correctly matches the valve with its function in the heart?

• A. The aortic valve allows oxygenated blood to flow from the left ventricle to the rest of the body.
• B. The mitral valve opens to allow blood flow from the left atrium to the left ventricle.
• C. The pulmonic valve allows deoxygenated blood to flow from the right ventricle to the pulmonary artery.
• D. The tricuspid valve allows deoxygenated blood to flow from the right atrium to the right ventricle.

Correct answer: A

Rationale: The correct answer is A. The aortic valve allows oxygenated blood to flow from the left ventricle to the rest of the body. When the left ventricle contracts, the aortic valve opens to allow blood to be pumped into the aorta, the body's main artery that carries oxygen-rich blood to various parts of the body. Choices B, C, and D are incorrect because they do not match the described functions of the mitral, pulmonic, and tricuspid valves, respectively. The mitral valve controls the flow of blood between the left atrium and left ventricle, the pulmonic valve regulates the flow of blood from the right ventricle to the pulmonary artery, and the tricuspid valve manages the blood flow between the right atrium and right ventricle.

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