Select one of the two reference articles listed below for this discussion. Within the selected article, read the abstract, introduction, conclusion, and at least one additional section of your choosing. 

From your research, how would you answer the question: “Why does sarcopenia occur? Where do the muscle fibers go?” While you may use scientific terminology, also include your own words to describe the phenomenon. Support your positions with the assigned reading. Use APA citation to credit your source.  

Carter, C. S., Justice, J. N., & Thompson, L. (2019). Lipotoxicity, aging, and muscle contractility: does fiber type matter? GeroScience, 41(3), 297–308. https://doi.org/10.1007/s11357-019-00077-z 

Budui, S. L., Rossi, A. P., & Zamboni, M. (2015). The pathogenetic bases of sarcopenia. Clinical Cases in Mineral & Bone Metabolism, 12(1), 22-26.