Testosterone is secreted by

Options

A. Leydi'g cells
B. Sertoli cells
C. Pituitary
D. Tastis.

Answer

**Step-by-Step Solution:**

1. **Understanding Testosterone**: Testosterone is a steroid hormone that plays a crucial role in the development of male reproductive tissues, as well as promoting secondary sexual characteristics such as increased muscle and bone mass.

2. **Identifying the Source**: The question asks where testosterone is secreted from. In males, testosterone is primarily produced in the testes.

3. **Role of Leydig Cells**: Within the testes, there are specific cells known as Leydig cells (also referred to as interstitial cells). These cells are responsible for the production of testosterone.

4. **Hormonal Regulation**: The secretion of testosterone is regulated by the luteinizing hormone (LH), which is produced by the pituitary gland. LH stimulates the Leydig cells to produce testosterone.

5. **Conclusion**: Since Leydig cells are the primary source of testosterone production in males, the correct answer to the question is **A. Leydig cells**.

**Final Answer**: A. Leydig cells

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