Final answer:
Axons are generally myelinated and extend from a neuron's cell body, ending with axon terminals that transmit signals to other cells.
Step-by-step explanation:
Axons are long, thin extensions of the cell body and are crucial for transmitting nerve impulses towards other neurons or cells. These axons are generally myelinated, which means they are covered with a myelin sheath, a layer that acts as an electrical insulator improving the speed of impulse transmission. Towards the end of an axon, it branches out into many fine structures known as axon terminals, which are involved in sending the signal to the next neuron or to a muscle or glandular cell.
The correct answer to the student's question would therefore be: 'Axons are myelinated until the end where they split into many fine axon terminals'.