Report Abuse. A lysosome is like the cleanup crew of the cell. One of its functions is the digestion of lipids, carbohydrates, and proteins into small molecules that can be used by the rest of the cell. Lysosomes are also involved in the breakdown of organellesthat have outlived their usefulness. Source(s): My biology book :).
What is spinal muscular atrophy (SMA)? SMA is a rare genetic neuromuscular disease that affects the part of the nervous system that controls voluntary muscle movement. In spinal muscular atrophy, there is a loss of important cells in the spinal cord called motor neurons, which are essential for muscle strength and movement.
In SMA types 1 through 4, the muscles closer to the center of the body (proximal muscles) usually are more affected, or at least affected much sooner, than the muscles farther away from the center. For example, the muscles of the thighs are weaker than the muscles of the lower legs and feet.