Mr. Watson, a 77-year-old man, is being seen for his annual physical examination. His serum level of vitamin D is 20 nmol/L. The nurse practitioner explains that this may due to which of the following physiological changes in aging?Group of answer choicesHis dislike of milk.Tastes buds on the tongue not sensing taste as well.His gastrointestinal (GI) tract not absorbing dairy as it did when he was younger.The decline in the skin’s ability to metabolize vitamin D.
Question
Mr. Watson, a 77-year-old man, is being seen for his annual physical examination. His serum level of vitamin D is 20 nmol/L. The nurse practitioner explains that this may due to which of the following physiological changes in aging?Group of answer choicesHis dislike of milk.Tastes buds on the tongue not sensing taste as well.His gastrointestinal (GI) tract not absorbing dairy as it did when he was younger.The decline in the skin’s ability to metabolize vitamin D.
Solution
The decline in the skin’s ability to metabolize vitamin D is the most likely physiological change in aging that could explain Mr. Watson's low serum level of vitamin D. As we age, our skin's ability to produce vitamin D from sunlight decreases, which can lead to lower levels of vitamin D in the body. This is a common issue among older adults, especially those who don't get much sun exposure.
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