Seoli cells play a key role in which of the following process

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