Question

Testosterone hormone is synthesized and secreted by:

• A. Epididymis
• B. Sertoli cells
• C. Sperm
• D. Leydig cells

Hint:

Think about which cell type sits between the seminiferous tubules, not inside them.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Inside each testis, the seminiferous tubules carry the sperm-forming cells, and the loose tissue between the tubules is called the interstitial space. This space holds small clusters of Leydig cells (interstitial cells).

Step 2: Recall what Leydig cells do.
Leydig cells are the main site of male sex hormone production. They make and release testosterone directly into the blood, and this hormone controls sperm formation and the male secondary sexual traits.

Step 3: Why the other options are wrong.
The epididymis stores and matures sperm; it does not make hormones. Sertoli cells sit inside the seminiferous tubule and nourish the developing sperm cells, but they do not secrete testosterone. Sperm are the male gametes themselves, not a hormone-producing tissue.

Final Answer:
Testosterone is made and released by the Leydig cells, option (D).