This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Physiology
Sperm acquires motility in 
Select and explain. 
A. Seminal vesicle, B. Testes, C. Epididymis, D. Ejaculatory duct
C: Epididymis
Answer: C: Epididymis 
Explanation: The seminiferous tubules of the testes are the staing point for the process, where spermatogonial stem cells adjacent to the inner tubule wall divide in a centripetal direction--beginning at the walls and proceeding into the innermost pa, or lumen--to produce immature sperm. Maturation occurs in the epididymis Ref: guyton and hall textbook of medical physiology 12 edition page number:625,626,627