Retrolisthesis can narrow the size of the spinal canal to allow spinal nerve irritation. The stress on the intervertebral disc as the backward movement of the vertebra occurs creates much stress on the disc which then causes back pain. (See the white arrow for retrolisthesis.) Examination.
Mitochondria provide cells their energy, and since muscle cells require more energy than skin cells, there is more mitochondria.itochondria is the part of cells that generate energy by turning nutrients and oxygen into fuel for the body. Muscle cells need this ability more because they are constantly â¦ working; fat cells do not need it as much.
In the human body, for example, most cells contain mitochondria because they allow for the synthesis of ATP (energy) fueled by the breaking down of sugars (glucose). Some cells, such as red blood cells, contain zero mitochondria because it is not necessarily beneficial or efficient for them to have any.