What is the most significant predictor of social isolation in older adults?

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: B

Rationale: Loneliness in older adults can lead to increased stress, inflammation, and unhealthy behaviors, all of which can elevate the risk of cardiovascular disease and depression. Social isolation can also impact mental health. Choice A is incorrect as loneliness does impact health. Choice C is incorrect as loneliness typically weakens immune function. Choice D is incorrect as loneliness affects both mental and physical health.

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: Dementia. Older adults often experience cognitive decline, memory loss, and behavioral changes that can be mistaken for symptoms of depression. Dementia is a common condition in the elderly that can be misdiagnosed due to overlapping symptoms such as apathy, social withdrawal, and changes in sleep patterns. Chronic fatigue syndrome (A), anemia (C), and sleep apnea (D) may also present with symptoms of fatigue and sleep disturbances, but they are less likely to be confused with depression in older adults compared to dementia.

Correct Answer: C

Rationale: The correct answer is C: Yoga and tai chi. These exercises focus on balance, flexibility, and strength, which are crucial for preventing falls in older adults. Yoga and tai chi also promote mindfulness and body awareness, further enhancing balance and coordination. Swimming (choice A) is beneficial for overall fitness but may not specifically target balance and fall prevention. Weight training (choice B) is important for muscle strength but may not address balance and flexibility adequately. Running (choice D) is high-impact and may actually increase the risk of falls for older adults.