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
Seoli cells play a key role in which of the following process 
Select and explain. 
A. Spermiogenesis, B. Testosterone secretion, C. Secretion of seminal fluid, D. Production of germ cells
A: Spermiogenesis
Answer: A: Spermiogenesis 
Explanation: Seoli cells are elongated cells in the seminiferous tubules that ensheathe spermatogenic cells, providing a microenvironment that suppos spermiogenesis and spermatocytogenesis; they secrete androgen-binding protein and establish the blood-testis barrier by forming tight junctions with adjacent Seoli cells.Ref: Ganong&;s review of medical physiology; 24th edition; page no:-419