What is the explanation for creatine kinase (CK)levels in a 14-year-old boy with Duchenne muscular dystrophy being much lower now than they were 5 years ago?

Question

Quizplus · Accepted Answer

Duchenne muscular dystrophy is a progressive disease that leads to the destruction of muscle tissue, resulting in decreased levels of creatine kinase. As the disease progresses, more and more muscle tissue is destroyed, leading to further decreases in CK levels. Therefore, the most likely explanation for the lower CK levels in this 14-year-old boy with Duchenne muscular dystrophy is that most of his muscle tissue has already been destroyed. Choice A is not correct because Duchenne muscular dystrophy is a degenerative disease and does not improve over time. Choice B is not correct because passive exercise does not significantly affect CK levels. Choice D is not supported by the information provided in the question.

What Is the Explanation for Creatine Kinase (CK)levels in a 14-Year-Old