This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Generator area in a nerve cell is 
Select and explain. 
A. Cell body, B. Initial segment, C. Axon, D. Dendrites
B: Initial segment
Answer: B: Initial segment 
Explanation: The first poion of the axon is called the initial segment. The Initial segment in spinal motor neurons, the initial node of Ranvier in cutaneous sensory neurons is a site where propagated action potentials are generated.(Ref: Ganong's Review of Medical Physiology Twenty-Third Edition)