Correct Answer: A

Rationale: The correct answer is 'A loss of melanin occurs in the normal aging process.' Graying hair in older adults is primarily due to a decrease in the number of melanocytes responsible for providing pigment and hair color. This reduction in melanin production leads to gray hair. The other choices are incorrect. While it is true that the skin becomes thinner with aging and the number of sweat glands and blood vessels decreases, these changes are not directly related to graying hair. Additionally, hereditary factors can influence when graying starts, but they do not cause the graying of hair itself.

Correct Answer: A

Rationale: The best response for the nurse when an elder client asks about capability for sexual activity in old age is to provide reassurance and open communication. Choice A is the correct answer as it acknowledges that elder adults can engage in sexual activity both physically and psychologically despite age-related changes. This response encourages further discussion and addresses the client's concerns. Choices B, C, and D contain some truths but are not the most therapeutic responses. Choice B implies that past sexual activity is a prerequisite for sexual activity in old age, which is not entirely accurate as intimacy can be experienced in various ways. Choice C, while true about alternative ways to meet sexual needs, does not directly address the client's question about sexual activity. Choice D focuses on the physiological aspect of sexual function, which is important but not the most appropriate initial response to the client's query.

Correct Answer: B

Rationale: According to Erikson's theory of psychosocial development, the primary task for an 8-year-old child aligns with the stage of industry versus inferiority. This stage focuses on mastering useful skills and tools of the culture, emphasizing competence in various areas. Option A, 'Developing a sense of control over self and body functions,' is more characteristic of the toddler stage, emphasizing autonomy and self-regulation. Option C, 'Gaining independence from parents,' is more relevant to the adolescent stage, where identity development and autonomy become crucial. Option D, 'Developing a sense of trust in the world,' pertains to the infant stage, highlighting the importance of forming secure attachments. Therefore, the correct answer is B as it directly corresponds to the developmental tasks associated with an 8-year-old child according to Erikson's theory.

Correct Answer: A

Rationale: School-age children are capable of taking responsibility for their own dental hygiene. Establishing good oral health habits during childhood can lead to a lifetime of cavity prevention. The nurse advises the parents that their children should brush with fluoride toothpaste and floss between their teeth after meals and before bedtime. This routine helps maintain good oral health and teaches children the importance of dental care. Choice A is the correct answer as it emphasizes both brushing and flossing after meals and at bedtime, which are crucial for effective dental care. Choices B, C, and D are incorrect as they do not stress the significance of both brushing and flossing after meals, which is essential for proper oral hygiene.

Correct Answer: A

Rationale: By 24 months of age, a child can perform various activities. While the child may be able to put on simple items of clothing, distinguishing front from back might still be a challenge. They may also be able to zip large zippers, put on shoes, wash and dry their hands, align two or more blocks, and turn book pages one at a time. However, the fine motor skill required to tie shoes is usually not developed at this age. Full independence in dressing, using the bathroom, and eating typically occurs around 4 to 5 years of age. Therefore, the correct expectation for a 24-month-old child would be aligning two or more blocks. Choices A, B, and C are incorrect as they represent skills that are usually achieved at a later age.