Nursing Elites

1. Low-level radiation, resulting from industrial leakage or medical X-rays, __________.

• A. is harmful only when combined with other teratogens
• B. can increase the risk of childhood cancer
• C. rarely causes lasting damage
• D. is safe during the last trimester

Correct answer: B

Rationale: Low-level radiation, whether from industrial leakage or medical X-rays, can increase the risk of childhood cancer by potentially damaging the developing fetus's cells. Even though the risk is relatively low, it is still a significant concern that should be acknowledged and monitored closely, especially during prenatal development. Choice A is incorrect as low-level radiation can still be harmful on its own without the need to be combined with other teratogens. Choice C is incorrect because low-level radiation exposure can indeed cause lasting damage, especially in the context of childhood cancer risk. Choice D is incorrect because low-level radiation exposure, even during the last trimester, can pose risks to the developing fetus and is not considered entirely safe.

2. During the second trimester, a white, cheeselike substance called __________ emerges on the skin.

• A. lanugo
• B. corpus luteum
• C. vernix
• D. chorion

Correct answer: C

Rationale: During the second trimester of pregnancy, a white, cheeselike substance called vernix emerges on the skin of the developing fetus. Vernix is a protective layer that helps prevent the skin from becoming waterlogged during the time in the amniotic fluid. Choice A, lanugo, is incorrect as lanugo refers to the fine, soft hair that covers the body of a fetus. Choice B, corpus luteum, is incorrect as it is a temporary endocrine structure involved in the menstrual cycle. Choice D, chorion, is incorrect as it is one of the membranes that surround the embryo and later the fetus.

3. Jade spent two years in a Mexican-American community studying communication between parents and children. Jade was using __________.

• A. naturalistic observation
• B. ethnography
• C. self-reports
• D. structured observation

Correct answer: B

Rationale: Jade was using ethnography. Ethnography involves the systematic study of people and cultures through participant observation and interviews. In this case, Jade spent two years in a Mexican-American community studying communication between parents and children, which aligns with the methodology of ethnography. Ethnography allows researchers to gain an in-depth understanding of a particular cultural group's behaviors, practices, and beliefs. Choice A, naturalistic observation, involves observing subjects in their natural environment without interference or manipulation. While similar to ethnography in some aspects, naturalistic observation does not typically involve the same level of cultural immersion and participant interaction as ethnography. Choice C, self-reports, refers to data collected directly from participants about their thoughts, feelings, or behaviors. This method relies on participants' subjective responses and may not provide the same depth of cultural insights as ethnography. Choice D, structured observation, involves observing behavior in a structured and controlled environment. Unlike ethnography, structured observation does not focus on the cultural nuances and immersive study of a specific community.

4. During Irina's first week of pregnancy, __________.

• A. heart muscles begin to develop
• B. the zygote multiplies and forms a blastocyst
• C. a primitive brain and spinal cord appear
• D. the embryo can move

Correct answer: B

Rationale: During the first week of pregnancy, the zygote (fertilized egg) undergoes rapid cell divisions and forms a blastocyst. This is a crucial stage where the cells differentiate and specialize, setting the foundation for the development of the embryo. It is during this time that the zygote implants itself into the uterine wall, initiating the process of pregnancy. Choices A, C, and D are incorrect because during the first week of pregnancy, the focus is on the initial development and multiplication of the zygote, not on the development of heart muscles, a primitive brain and spinal cord, or the embryo's ability to move.

5. __________ may heighten the effects of a high-fat diet.

• A. Sex hormones
• B. Over-the-counter medications
• C. Free radicals
• D. Low body weight

Correct answer: C

Rationale: Free radicals may contribute to oxidative stress, increasing the risk of conditions associated with a high-fat diet. When consuming a high-fat diet, the body may produce more free radicals, leading to oxidative damage. Sex hormones, over-the-counter medications, and low body weight do not directly heighten the effects of a high-fat diet like free radicals do.

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