Question
Study the following flow chart. Name the hormones involved at each stage. Explain their functions.
✓
Answer
| Hypothalamus |
| $\downarrow$ |
| Pituitary |
| $\downarrow$ |
| Testes |
| $\downarrow$ |
| Sperms |
- Hypothalamus secretes gonadotropin-releasing hormone (GnRH), which stimulates the anterior pituitary gland to secrete gonadotropins like luteinizing hormone (LH) and follicle stimulating hormone (FSH).
- LH stimulates the Leydig cells of testes to secrete androgens (like testosterone), which control spermatogenesis.
- FSH acts on Sertoli cells of testes, which in response secrete certain factors necessary for spermiogenesis; the sperm heads become embedded in the sertoli cells.
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