Some cells in the body have more mitochondria than others. For example, nerve cells, muscle cells, and liver cells have lots of mitochondria. Bone cells and fat cells have very few mitochondria. Why...

Some cells in the body have more mitochondria than others. For example, nerve cells, muscle cells, and liver cells have lots of mitochondria. Bone cells and fat cells have very few mitochondria. Why do muscle cells have more mitochondria than fat cells?