Nursing Elites

1. The most rapid prenatal changes take place in the period of the __________.

• A. zygote
• B. blastocyst
• C. embryo
• D. fetus

Correct answer: C

Rationale: The correct answer is C: embryo. The most rapid prenatal changes occur during the embryo stage, which spans from approximately 2 to 8 weeks after conception. This period is crucial as major organs and systems of the body develop rapidly, laying the foundation for future growth and development. The zygote stage is the initial single-celled entity formed by the union of sperm and egg, while the blastocyst stage involves the cluster of cells resulting from the zygote dividing and growing. The fetus stage follows the embryo stage and focuses on refining and growing existing structures rather than rapid development. Therefore, the embryo stage is where the most significant and rapid changes take place in prenatal development.

2. Like longitudinal research, cross-sectional studies can be threatened by __________.

• A. practice effects
• B. participant dropout
• C. sequential timing
• D. cohort effects

Correct answer: D

Rationale: Cross-sectional studies can be threatened by cohort effects because different age groups may have experienced different historical or social contexts, influencing the results. This disparity can lead to invalid comparisons between age groups, confounding the study's findings. Option A, practice effects, refer to changes in participants' behavior due to repeated testing, not a specific threat to cross-sectional studies. Participant dropout (Option B) is a threat related to attrition in longitudinal studies, not cross-sectional studies. Sequential timing (Option C) does not pose a threat to cross-sectional studies; instead, it refers to the order of tasks in a study design.

3. According to research on family chaos, mothers who __________ experience greater psychological stress.

• A. make family meals
• B. frequently multitask
• C. work outside the home
• D. cosleep with their infants

Correct answer: B

Rationale: According to research on family chaos, mothers who frequently multitask experience greater psychological stress. Multitasking can lead to increased stress levels as individuals juggle multiple responsibilities and tasks simultaneously, leading to a sense of being overwhelmed and unable to focus effectively. This can contribute to higher levels of psychological stress for mothers in particular, impacting their overall well-being. Choices A, C, and D are incorrect because the research specifically links frequent multitasking, not making family meals, working outside the home, or cosleeping with infants, to greater psychological stress among mothers.

4. Who believed that complex mental activities have their origins in social interaction?

• A. Jean Piaget
• B. Renée Baillargeon
• C. Noam Chomsky
• D. Lev Vygotsky

Correct answer: D

Rationale: The correct answer is Lev Vygotsky. Vygotsky emphasized the role of social interaction and cultural tools in the development of higher cognitive functions. Jean Piaget focused more on individual cognitive development stages, Renée Baillargeon is known for her work in infant cognition and object permanence, and Noam Chomsky is renowned for his theories in linguistics and the study of language.

5. Mounting evidence suggests that __________ is a major contributor to SIDS.

• A. impaired brain functioning
• B. higher-than-average birth weight
• C. organized and patterned sleep behavior
• D. a family history of chromosomal abnormalities

Correct answer: A

Rationale: Impaired brain functioning is a major contributor to Sudden Infant Death Syndrome (SIDS). Research has shown that abnormalities in the brainstem, which controls automatic functions like breathing and heart rate, can play a role in SIDS cases. As such, mounting evidence suggests that compromised brain functioning is a significant factor in the occurrence of SIDS. Choices B, C, and D are incorrect. Higher-than-average birth weight, organized and patterned sleep behavior, and a family history of chromosomal abnormalities are not identified as major contributors to SIDS according to the provided information.

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