Final answer:
On average, a motor neuron in the spinal cord can establish thousands to tens of thousands of distinct synapses on its dendrites and cell body.
Step-by-step explanation:
The dendrites and cell body of a motor neuron in the spinal cord receive input from other neurons through synapses. The exact number of distinct synapses on a motor neuron can vary depending on several factors, including the specific location in the spinal cord and the individual. However, on average, a motor neuron in the spinal cord can establish thousands to tens of thousands of distinct synapses on its dendrites and cell body.