Question

which of the following stimulates spermatogenesis in the seminiferous tubules?
a luteinizing hormone (lh)
b follicle - stimulating hormone (fsh)
c testosterone
d inhibin

Explanation:

• Luteinizing hormone (LH): Stimulates Leydig cells to produce testosterone, not directly spermatogenesis.
• Follicle - stimulating hormone (FSH): Acts on Sertoli cells in seminiferous tubules to stimulate spermatogenesis.
• Testosterone: While important for male reproductive function, its role is more in maintaining male secondary sexual characteristics and libido, and it works in conjunction with FSH. The direct stimulator of spermatogenesis in seminiferous tubules is FSH.
• Inhibin: Inhibits FSH secretion, so it does not stimulate spermatogenesis.

Answer:

B. Follicle - stimulating hormone (FSH)