Q: What is secreted by the cells surrounding spermatogonia to help sperm production?


Read this paragraph and choose the correct option from the provided answers:

Seminiferous tubules can be seen in a cross section of a testis pictured in Figure below . The tubule is lined with spermatogonia, which are diploid, sperm-producing cells. Surrounding the spermatogonia are other cells. Some of these other cells secrete substances to nourish sperm, and some secrete testosterone, which is needed for sperm production.

 Choices:

- estrogen

- dihydrotestosterone

- follicle stimulating hormone

- testosterone


A:
testosterone