Which of these is NOT a part of the structure of a typical neuron?

Islets of Langerhans are not a part of the structure of a typical neuron. Rather, they are an important part of the endocrine system located in the pancreas. The islets contain different types of cells, including alpha cells that secrete glucagon, beta cells that secrete insulin, and delta cells that secrete somatostatin. These hormone-secreting cells are responsible for regulating blood sugar levels and the overall metabolic function of the body. While neurons are specialized cells in the nervous system responsible for transmitting information through electrical and chemical signals, the islets of Langerhans have a distinct function related to hormone secretion in the pancreas, making them unrelated to the structure of a typical neuron.