Final answer:
The expanded area of the axon located next to the cell body is called the axon hillock. It represents the beginning of the axon and is also referred to as the initial segment.
Step-by-step explanation:
The expanded area of the axon located next to the cell body is called the axon hillock. It represents the beginning of the axon and is also referred to as the initial segment. The axon is a long, thin extension of the cell body, and it transmits nerve impulses away from the cell body towards other cells. At the end of the axon, it branches out into multiple axon terminals that transmit signals to other cells.