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.
An atom is the smallest unit of matter.(well, there are smaller(quarks, leptons) but for the sake of simplicity, atoms are among the smallest) A molecule is something like H2O(water) and is made up of atoms. A cell is made up of atoms and molecules.