And let's begin with bullet point number one, the size of the motor unit. Now what do we mean by the size of the motor unit? So earlier we said that a single motor unit can consist of thousands of muscle cells. So basically those motor units that have more muscle cells will create a greater force than those that have less muscle cells. So to see what we mean, let's take a look at the following diagram. So in this diagram in blue, we have our motor neuron.