Which of the Following is Not True About the Sustentacular

Question

Which of the following is not true about the sustentacular cells of the seminiferous tubules?
A) They secrete inhibin.
B) They secrete testosterone.
C) They support spermiogenesis.
D) They secrete androgen-binding protein.
E) They maintain the blood-testis barrier.

Accepted Answer

Sustentacular cells, also known as Sertoli cells, do not secrete testosterone; this function is carried out by the Leydig cells located in the interstitial space of the testes. Sustentacular cells are involved in supporting and nourishing developing sperm cells, secreting inhibin, androgen-binding protein, and maintaining the blood-testis barrier, but not in the secretion of testosterone.