Nursing Elites

1. How do isotopes affect the atomic mass of an element?

• A. Isotopes have no effect on the atomic mass of an element.
• B. Isotopes cause the atomic mass of an element to vary slightly.
• C. Isotopes cause the atomic mass of an element to be exactly the same for all isotopes of that element.
• D. Isotopes cause the atomic mass of an element to vary greatly.

Correct answer: B

Rationale: Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. Since the atomic mass of an element is the weighted average of the masses of its isotopes, the presence of isotopes causes the atomic mass of an element to vary slightly. This variation occurs because different isotopes have different masses due to their varying numbers of neutrons. The atomic mass is affected by the abundance of each isotope, leading to a slight fluctuation in the overall atomic mass of the element. Choice A is incorrect because isotopes do influence the atomic mass. Choice C is incorrect because isotopes have different masses, affecting the overall atomic mass. Choice D is incorrect as isotopes typically do not cause a significant variation in atomic mass, but rather a slight fluctuation.

2. What is one idea that the students above seem to agree on, based on their statements?

• A. Students should be allowed to express themselves through their apparel.
• B. Schools should give students a certain amount of respect.
• C. Students should focus more on school than on their appearance.
• D. Schools would violate students' basic rights by enforcing a dress code.

Correct answer: B

Rationale: Both Lisa Grant and Vivian Harris express the idea that schools should give students a certain amount of respect. Lisa Grant believes that wearing uniforms would help students respect each other based on ideas and character rather than appearance. Vivian Harris, on the other hand, argues against uniforms, emphasizing that clothing is crucial for self-expression and taking it away suppresses students' rights. However, at the core of both their arguments is the underlying theme of advocating for respect towards students.

3. Select the context clue from the following sentence that helps you define the multiple meaning word formula: 'The mother gave her baby his formula after he woke up from his nap in the car.'

• A. mother
• B. baby
• C. nap
• D. car

Correct answer: B

Rationale: The correct answer is 'B: baby.' In the sentence, 'baby' is the context clue that helps define the multiple meaning word 'formula.' Here, 'formula' refers to baby food, as babies typically consume formula. The word 'baby' directly relates to the context of feeding a baby with formula. Choice A, 'mother,' is not directly related to the meaning of 'formula' in this context. Choices C and D, 'nap' and 'car,' are also not directly connected to the meaning of 'formula' as they do not provide any relevant information about the word's meaning in this sentence.

4. Which type of capillary is the most permeable?

• A. Continuous capillaries
• B. Sinusoidal capillaries
• C. Fenestrated capillaries
• D. Vascular capillaries

Correct answer: B

Rationale: Sinusoidal capillaries are indeed the most permeable type. They are characterized by large gaps between endothelial cells, allowing for the passage of large molecules and cells. These capillaries are commonly found in organs like the liver, bone marrow, and spleen where high permeability is required for specialized functions such as filtration and exchange of substances. Continuous capillaries have tight junctions and are the least permeable, found in muscles, lungs, and the central nervous system where strict control over permeability is needed. Fenestrated capillaries, on the other hand, have small pores or fenestrations and are intermediate in permeability, found in organs like the kidneys, endocrine glands, and intestines where selective permeability is necessary. Vascular capillaries is not a specific type of capillary and is not a valid choice.

5. Which of the following correctly lists the normal blood flow through the heart?

• A. Left ventricle, left atrium, body, right ventricle, right atrium, lungs
• B. Left atrium, left ventricle, lungs, right atrium, right ventricle, body
• C. Right atrium, right ventricle, lungs, left atrium, left ventricle, body
• D. Right ventricle, right atrium, body, left atrium, left ventricle, lungs

Correct answer: B

Rationale: The correct order of normal blood flow through the heart is as follows: from the body, blood flows into the right atrium, then to the right ventricle, followed by the lungs through the pulmonary artery for oxygenation. Oxygenated blood then returns to the heart through the pulmonary veins into the left atrium, then moves into the left ventricle before being pumped out to the body. Choice B correctly depicts this sequential flow of blood through the heart. Choices A, C, and D are incorrect as they do not follow the typical path of blood flow through the heart.

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