Seoli cell secrets: (A) Androgen binding protein, (B) Testosterone, (C) LH, (D) FSH
Answer is A. Androgen binding protein is a protein secreted by testicular Seoli cells along with inhibin and mullerian inhibiting substance. Androgen binding protein probably maintains a high concentration of androgen in the seminiferous tubules.Ref: Ganong&;s review of medical physiology; 24th edition; page no: 421