Nokea
On which biological theory of aging is the prevention of telomere shortening based?
- A. Genetic research
- B. Caloric restriction
- C. Oxidative stress
- D. Cross-link
Correct Answer: A
Rationale: The correct answer is A: Genetic research. Telomere shortening is primarily based on the theory of cellular senescence, which is related to genetic research. Telomeres are protective caps at the end of chromosomes that shorten with each cell division. Genetic research has shown that telomere shortening is associated with aging and age-related diseases. Caloric restriction, oxidative stress, and cross-link theories of aging are not directly linked to telomere shortening. Caloric restriction focuses on extending lifespan by reducing calorie intake, oxidative stress theory suggests that aging is caused by cumulative damage from reactive oxygen species, and cross-link theory emphasizes the accumulation of non-reversible bonds between molecules as a cause of aging.
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All of the following are characteristics associated with centenarians EXCEPT:
- A. Exercise.
- B. Smoking.
- C. Weight control.
- D. Delayed onset of disease.
Correct Answer: B
Rationale: The correct answer is B: Smoking. Centenarians are individuals who live to be 100 years old or older and smoking is a known risk factor for various diseases and premature death. Exercise, weight control, and delayed onset of disease are commonly associated characteristics of centenarians as they promote overall health and longevity. Smoking, on the other hand, has been proven to have detrimental effects on health and is not typically seen in individuals who live to be 100 or older. Therefore, the absence of smoking is a more accurate characteristic associated with centenarians.
A case manager is likely to have how many years of nursing education?
- A. 1 to 1.5
- B. 4 to 6
- C. 2
- D. 8 or more
Correct Answer: C
Rationale: The correct answer is C: 2 years. A case manager typically requires a minimum of 2 years of nursing education to effectively coordinate care for patients. This level of education provides the necessary knowledge and skills to assess, plan, implement, and evaluate patient care.
- A: 1 to 1.5 years - Insufficient to acquire the depth of knowledge needed for case management.
- B: 4 to 6 years - Excessive for the role of a case manager, as it typically does not require a bachelor's degree.
- D: 8 or more years - Overqualified for the position of a case manager, as this level of education is beyond what is necessary for the role.
What is the most common type of dementia in older adults?
- A. Alzheimer's disease
- B. Vascular dementia
- C. Lewy body dementia
- D. Frontotemporal dementia
Correct Answer: A
Rationale: The correct answer is A: Alzheimer's disease. It is the most common type of dementia in older adults, accounting for around 60-80% of cases. Alzheimer's is characterized by the presence of beta-amyloid plaques and tau protein tangles in the brain, leading to memory loss and cognitive decline. Vascular dementia (B) is caused by impaired blood flow to the brain, Lewy body dementia (C) is characterized by abnormal protein deposits in the brain, and Frontotemporal dementia (D) affects the frontal and temporal lobes of the brain, leading to changes in behavior and personality. However, in older adults, Alzheimer's disease is the most prevalent form of dementia due to its widespread impact on memory and cognition.
Which of the following best describes the concept of "cognitive reserve" in older adults?
- A. It refers to the brain's ability to compensate for damage through enhanced neurogenesis.
- B. It refers to the relationship between cognitive decline and physical health.
- C. It is the brain's ability to maintain function despite age-related changes and pathology.
- D. It is the process of developing new cognitive abilities later in life.
Correct Answer: C
Rationale: The correct answer is C: "It is the brain's ability to maintain function despite age-related changes and pathology." Cognitive reserve in older adults refers to the brain's ability to withstand age-related changes and pathology while maintaining cognitive function. This concept suggests that individuals with higher cognitive reserve may show fewer cognitive deficits even in the presence of brain damage or pathology.
Choice A is incorrect because cognitive reserve is not about compensating for damage through enhanced neurogenesis but rather about maintaining function despite changes.
Choice B is incorrect because cognitive reserve is not specifically about the relationship between cognitive decline and physical health; it focuses on maintaining cognitive function.
Choice D is incorrect because cognitive reserve is not about developing new cognitive abilities later in life but rather preserving existing cognitive function.
The nurse is performing a basic assessment on an older client. Which of the following is a common age-related change?
- A. Decreased skin elasticity and thinning
- B. Increased muscle mass
- C. Increased cardiac output
- D. Increased renal filtration rate
Correct Answer: A
Rationale: Step-by-step rationale:
1. Aging causes decreased collagen production, leading to decreased skin elasticity and thinning.
2. Loss of subcutaneous fat contributes to the appearance of aging skin.
3. Wrinkles and sagging are common signs of decreased skin elasticity in older adults.
4. Increased muscle mass, increased cardiac output, and increased renal filtration rate are not typical age-related changes.
Summary: Skin changes such as decreased elasticity and thinning are common in older adults due to reduced collagen production and loss of subcutaneous fat. Increased muscle mass, cardiac output, and renal filtration rate are not typical age-related changes.