Topics:
Animal Physiology, Animal Refresher
Endocrine Cells of Testes
The endocrine cells of testes are:
- Leydig cells — Correct Answer
- Sertoli cells
- Both Leydig and Sertoli cells
- None of the above
Explanation:
Correct Answer: Leydig cells
Leydig cells (also called interstitial cells of Leydig) are the primary endocrine cells of the testes. They are located in the interstitial tissue between the seminiferous tubules and are responsible for secreting testosterone under the stimulation of Luteinizing Hormone (LH).
Two Key Cell Types of the Testes
| Cell Type | Location | Function | Stimulated by |
|---|---|---|---|
| Leydig cells | Interstitial tissue (between tubules) | Secrete testosterone (endocrine function) | LH |
| Sertoli cells | Inside seminiferous tubules | Support spermatogenesis; form blood-testes barrier; secrete inhibin & ABP | FSH |
Why Other Options Are Wrong
- Sertoli cells → These are supporting (nurse) cells, not primarily endocrine; they support spermatogenesis, not hormone secretion into blood.
- Both → Sertoli cells do secrete inhibin and androgen-binding protein (ABP), but the primary endocrine cells responsible for testosterone production are specifically Leydig cells.
- None → Incorrect; Leydig cells are well-established endocrine cells.
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
