Nursing Elites

1. Which hormone is responsible for milk production in the breasts after childbirth?

• A. Estrogen
• B. Prolactin
• C. Oxytocin
• D. Relaxin

Correct answer: B

Rationale: Prolactin is the hormone responsible for milk production in the breasts after childbirth. It is produced by the pituitary gland and stimulates the mammary glands to produce milk. Estrogen aids in the development of breast tissue during pregnancy but is not directly involved in milk production. Oxytocin is responsible for milk ejection during breastfeeding, while Relaxin helps relax uterine muscles during pregnancy but is not directly linked to milk production.

2. Which of the following statements offers a supporting argument for the passage's claim that many coastal islands are eroding?

• A. Recent hurricane seasons have been expensive.
• B. The Atlantic Basin is entering an active period.
• C. Louisiana has lost 2,000 square miles of coastal land.
• D. Barrier islands are the first line of defense against coastal storms.

Correct answer: C

Rationale: Statement C directly provides evidence of coastal land erosion by stating that Louisiana has lost a significant amount of coastal land area. This supports the passage's claim that many coastal islands are eroding. Choice A is incorrect because the expense of recent hurricane seasons does not directly relate to coastal land erosion. Choice B is incorrect as the active period of the Atlantic Basin does not specifically address coastal land erosion. Choice D, while related to coastal storms, does not directly support the claim that many coastal islands are eroding.

3. What makes bone resistant to shattering?

• A. The calcium salts deposited in the bone
• B. The collagen fibers
• C. The bone marrow and network of blood vessels
• D. The intricate balance of minerals and collagen fibers

Correct answer: D

Rationale: Bone is resistant to shattering due to the intricate balance of minerals and collagen fibers. The minerals provide strength to the bone, while the collagen fibers offer flexibility. This combination ensures that bone is a robust and resilient tissue. Choice A (The calcium salts deposited in the bone) is incorrect as calcium salts alone do not provide the necessary flexibility for bone to withstand shattering. Choice B (The collagen fibers) is partially correct as collagen fibers contribute to the flexibility of bone but alone are not sufficient for resistance to shattering. Choice C (The bone marrow and network of blood vessels) is incorrect as they do not directly contribute to the physical resistance of bone to shattering.

4. What does the following sentence most nearly mean? 'The preparatory instars of such insects are aquatic; the adult instar is aerial.'

• A. The volume of water is necessary for preparing the insect for transition rather than the volume of the air.
• B. The insect's body is shaped like a star in both water and air.
• C. The stage of preparation between molting occurs in water, while the final stage happens in the air.
• D. These insects first breathe in water through gills and then continue to use the same organs to breathe in the air.

Correct answer: C

Rationale: The sentence indicates that the insects undergo different stages of development, with the preparatory instars being aquatic and the adult instar being aerial. This highlights the adaptability of these insects to different environments. Choice A is incorrect as it focuses on the volume of water and air rather than the stages of development in different environments. Choice B is unrelated to the content of the sentence and does not capture the meaning accurately. Choice D is incorrect as it specifically mentions breathing through gills, which is not explicitly stated in the sentence. Therefore, choice C is the best interpretation of the sentence.

5. Which of the following lists is in order from least to greatest? 2−1 , −(4/3), (−1)3 , (2/5)

• A. 2−1 , −(4/3), (−1)3 , (2/5)
• B. −(4/3), (−1)3 , 2−1 , (2/5)
• C. −(4/3), (2/5), 2−1 , (−1)3
• D. −(4/3), (−1)3 , (2/5), 2−1

Correct answer: D

Rationale: To determine the correct order from least to greatest, start by simplifying the expressions. 2^(-1) = 1/2 and (-1)^3 = -1. Now, comparing the values, (-4/3) is the most negative, followed by -1, then (2/5), and finally 1/2. Therefore, the correct order is (-4/3), (-1)^3, (2/5), 2^(-1), making choice D the correct answer. Choices A, B, and C are incorrect because they do not follow the correct order from least to greatest as determined by comparing the values of the expressions after simplification.

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