Which of the following organizations have interdisciplinary membership?

Correct Answer: A

Rationale: The correct answer is A, the Gerontological Society of America, because it includes members from various disciplines such as sociology, psychology, biology, and medicine. This interdisciplinary approach allows for a holistic understanding of aging. The other choices focus specifically on nursing (B), aging (C), or higher education (D), and do not encompass a wide range of disciplines like choice A. This makes them more specialized and less likely to have a diverse membership across different fields.

Correct Answer: B

Rationale: The correct answer is B because swelling in one leg with pitting edema is a classic sign of DVT. Pitting edema suggests fluid accumulation due to compromised venous circulation, which is common in DVT. Bilateral calf tenderness (choice A) is more indicative of muscle strain. Shortness of breath (choice C) is suggestive of a pulmonary embolism, a complication of DVT. Two plus palpable pulses (choice D) indicate good arterial circulation, not DVT.

Correct Answer: C

Rationale: The correct answer is C: Loss of a spouse or close family member. This is the most significant predictor of social isolation in older adults because losing a spouse or close family member can result in decreased social interactions and emotional support. This loss can lead to feelings of loneliness and isolation. Incorrect options: A: Lack of access to healthcare - While lack of access to healthcare can impact overall health, it is not the primary factor contributing to social isolation. B: Limited income and resources - Financial constraints can affect social activities, but they are not as impactful as losing a loved one. D: High levels of physical activity - While physical activity is important for overall well-being, it is not directly correlated with social isolation in older adults.

Correct Answer: C

Rationale: The correct answer is C because older adults often experience adverse drug reactions due to their slower renal and hepatic function. This leads to a decreased ability to clear drugs from the body efficiently, increasing the risk of drug accumulation and toxicity. Choice A is incorrect because aging typically results in slower drug metabolism, not faster. Choice B is also incorrect as older adults tend to take more medications, increasing the likelihood of drug interactions and adverse reactions. Choice D is incorrect because aging is associated with a decline in immune function, making older adults more susceptible to adverse drug reactions.

Correct Answer: B

Rationale: The correct answer is B: Thyroid gland. The thyroid gland produces hormones that regulate metabolism. In older adults, decreased thyroid function, known as hypothyroidism, can lead to a decrease in metabolism. This can result in symptoms such as fatigue, weight gain, and slowed heart rate. A: Kidney - While the kidneys play a role in filtering waste and maintaining fluid balance, decreased kidney function typically does not directly impact metabolism. C: Brain - The brain plays a crucial role in regulating various bodily functions, but it does not directly control metabolism. D: Skeleton - The skeleton provides structural support and protects organs but does not directly influence metabolism.

Correct Answer: B

Rationale: The correct answer is B because limited physical activity and poor nutrition have been consistently linked to cognitive decline in older adults. Physical activity promotes blood flow to the brain, which helps with cognitive function. Additionally, a balanced diet rich in nutrients supports brain health. Genetic predisposition (A) can play a role but is not the most closely associated factor. Social engagement and mental stimulation (C) are beneficial for cognitive health but not the primary factor for decline. Early retirement and lack of work-related stress (D) are not directly linked to cognitive decline.

Correct Answer: D

Rationale: The correct answer is D because sarcopenia, which is the age-related loss of muscle mass and strength, directly impacts balance and mobility in older adults. Muscle weakness from sarcopenia reduces stability and coordination, increasing the risk of falls. This affects functional independence as it limits the ability to perform daily activities safely. Choices A, B, and C are incorrect as sarcopenia primarily affects muscle mass and strength, not body fat, lung capacity, or joint stiffness.

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.

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.