Final answer:
The large cells in the suprarenal medulla, called chromaffin cells, release epinephrine and norepinephrine into the bloodstream. They are located in the adrenal medulla, which is surrounded by the adrenal cortex.
Step-by-step explanation:
The large cells in the suprarenal medulla resemble neurons in sympathetic ganglia and are called chromaffin cells. These cells release two neurotransmitters, epinephrine and norepinephrine, into the bloodstream. They are part of the adrenal medulla, which is located in the center of each adrenal gland and is surrounded by the adrenal cortex.