Nursing Elites

1. The genetic influences that determine behavior may never be fully understood due to ________

• A. the ease of researching to differentiate between the effects of the environment and the effects of genes.
• B. the likelihood that most behaviors are determined by the interaction of many genes and the environment.
• C. the tendency to rely on twin studies in genetic research.
• D. our significant understanding of how genes impact brain chemistry.

Correct answer: B

Rationale: The correct answer is B because most behaviors are influenced by a complex interaction of many genes and the environment. Choice A is incorrect because it states that it is easy to differentiate between the effects of the environment and genes, which is not the case. Choice C is incorrect because although twin studies are commonly used in genetic research, this alone does not hinder the full understanding of genetic influences on behavior. Choice D is incorrect because even though we have some understanding of how genes impact brain chemistry, this does not mean that we fully understand the genetic influences on behavior.

2. What are influences that are unusual events with a major impact on individual lives because they disrupt the expected sequence of the life cycle?

• A. Nonnormative influences
• B. Normative history-graded influence
• C. Normative age-graded influence
• D. Sensitive period

Correct answer: A

Rationale: Nonnormative influences refer to unusual events that have a significant impact on individuals' lives by disrupting the typical life cycle. They are events that are not typical for a specific age or cohort. Normative history-graded influences (choice B) are common influences shared by a specific generation due to historical circumstances. Normative age-graded influences (choice C) are typical events that occur at a particular age for most people. A sensitive period (choice D) is a biologically determined time during which specific experiences have a lasting impact on development.

3. In a breech presentation, how is the infant positioned for delivery?

• A. Is too large to be delivered vaginally.
• B. Is delivered feet or bottom first.
• C. Is delivered head first.
• D. Appears face down.

Correct answer: B

Rationale: In a breech presentation, the infant is positioned to be delivered feet or bottom first. This is because the baby's pelvis or feet enter the birth canal before the head. Therefore, choice B is correct. Choices A, C, and D are incorrect because a breech presentation specifically refers to the baby being positioned feet or bottom first, not head first, face down, or being too large for vaginal delivery.

4. What is the result when a single zygote separates into two parts, each developing into a separate individual?

• A. Dizygotic twin
• B. Monozygotic twin
• C. Fraternal twin
• D. Nonidentical twin

Correct answer: B

Rationale: The correct answer is B, Monozygotic twin. A monozygotic twin, also known as an identical twin, is the result when a single zygote splits into two parts, leading to the development of two genetically identical individuals. Choices A, C, and D are incorrect because they do not accurately describe the scenario where a single zygote splits into two parts to form identical twins. Dizygotic twin (Choice A) refers to fraternal twins, which result from two separate eggs fertilized by two different sperm cells. Fraternal twin (Choice C) is another term for dizygotic twins, arising from two separate zygotes. Nonidentical twin (Choice D) is a synonymous term for dizygotic or fraternal twins, indicating that they are not genetically identical.

5. What role does brain development play in psychopathology?

• A. Brain development has no impact on psychopathology.
• B. Brain development plays a crucial role in the onset of many mental disorders.
• C. Brain development is only linked to physical disabilities, not mental disorders.
• D. Brain development is not associated with mental health.

Correct answer: B

Rationale: Brain development plays a crucial role in the onset of many mental disorders. It affects how the brain processes information and responds to stress, influencing the development of psychopathology. Choice A is incorrect as brain development does impact psychopathology. Choice C is incorrect as brain development is linked to mental disorders as well. Choice D is incorrect as brain development has implications for mental health.

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