WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms muscle weakness and weight loss (unintentional) including Lack of exercise, Hypocalcemia, and Multiple sclerosis. There are 44 conditions associated with muscle weakness and weight loss (unintentional).
What is the smallest structure in biology? Electrons Electrons are the smallest part of an atom. However, in Biology, the smallest unit is an atom, which make up molecules, compounds, organelles, cells, tissues, orgâ¦ans, organ systems, organisms, populations, spheres, and eventually everything. 1 person found this useful.
The smallest unit of skeletal muscle is the muscle fiber or  myofiber. These fibers contain a lot of the nuclei, sarcomeres and  mitochondria.he smallest unit of skeletal muscle is the muscle fiber or  myofiber. These fibers contain a lot of the nuclei, sarcomeres and  mitochondria.