Do muscle cells contain more mitocondria than fat cells?

Yes, muscle cells contain more mitochondria than fat cells.

Mitochondria are the organelles that produce energy for cells. Muscle cells require a lot of energy to function, so they have a large number of mitochondria. Fat cells, on the other hand, do not require as much energy, so they have fewer mitochondria.

The number of mitochondria in a cell is not fixed. It can change depending on the cell's energy needs. For example, if a muscle cell is exercised regularly, it will increase the number of mitochondria in order to meet the increased energy demand.