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 cell secrets 
Select and explain. 
A. Androgen binding protein, B. Testosterone, C. LH, D. FSH
A: Androgen binding protein
Answer: A: Androgen binding protein 
Explanation: 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