Correct Answer: C

Rationale: The correct answer is C - Difficulty walking and balance issues. Frailty in older adults is characterized by physical weakness, decreased muscle strength, and reduced functional capacity. Difficulty walking and balance issues are key indicators of frailty as they reflect a decline in physical capabilities. Increased muscle mass (A) is not a sign of frailty but rather a positive indicator of strength. Unexplained weight gain (B) may not necessarily be related to frailty. Improved cognitive function (D) is unrelated to physical frailty.

Correct Answer: B

Rationale: The correct answer is B: dehydration. Mr. J's symptoms of flu-like illness, diarrhea, vomiting, confusion, lethargy, dry skin, brown tongue, sunken cheeks, and concentrated urine are indicative of severe dehydration. Dehydration can lead to electrolyte imbalances, decreased blood volume, and impaired organ function, resulting in confusion and lethargy. Skin changes, dry mucous membranes, and concentrated urine are also classic signs of dehydration. The other choices (A, C, D) do not align with the constellation of symptoms presented by Mr. J and are less likely based on the information provided.

Correct Answer: A

Rationale: The correct answer is A: Free radical theory. Vitamin C is thought to prevent aging by combatting free radicals, which are highly reactive molecules that can damage cells and contribute to aging. Vitamin C acts as an antioxidant, neutralizing free radicals and protecting cells from oxidative damage. Immunological theory (B) focuses on the role of the immune system in aging. Oxidative stress theory (C) is related to free radical theory but does not specifically address the role of vitamin C. Telomere theory (D) pertains to the shortening of telomeres, which are protective structures at the end of chromosomes, but is not directly related to the role of vitamin C in preventing aging.

Correct Answer: A

Rationale: The correct answer is A: Promoting wellness. Providing information about diet and exercise for a healthy diabetic client falls under promoting wellness because it focuses on proactive measures to maintain health and prevent complications. It aims to empower the client to make healthy lifestyle choices. B: Preventing illness is not the best description as the client is already diabetic, so the focus is on managing the condition rather than solely preventing it. C: Treating disease is not accurate because the client is already diabetic and the goal is not to treat the disease, but rather manage it effectively. D: Restoring health is not applicable in this scenario as the client is not in a state of compromised health that needs to be restored.

Correct Answer: D

Rationale: The correct answer is D: Atrophy of dendrites in the cerebral cortex. With aging, there is a natural decline in brain volume and synaptic connections, leading to reduced dendritic branching and synaptic density in the cerebral cortex. This affects processing speed and cognitive functions, requiring more time for older adults to respond to questions. Rationale: A: Increased secretion of cholinesterase is not a physiological change associated with aging that would require more time for answering questions. B: Decreased secretion of neurotransmitters may occur with aging but is not the primary reason for slower processing speed in older adults. C: Loss of spinal cord and brainstem neurons is not the main factor influencing older adults' response time to questions compared to atrophy of dendrites in the cerebral cortex.