The cells that produce testosterone in the testis are called ________.

• A. Granulosa cells
• B. Sertoli cells
• C. Spermatogonia
• D. Leydig cells

Answer: (D)

Verified step by step guidance

1. Understand the context of the question: Testosterone is a hormone primarily produced in the male reproductive system, specifically in the testis. The question is asking which cells are responsible for this production.
2. Review the roles of the cell types listed: Granulosa cells are found in the ovaries and are involved in estrogen production, not testosterone. Sertoli cells support sperm development but do not produce testosterone. Spermatogonia are the precursor cells for sperm and are not involved in hormone production.
3. Identify the correct cell type: Leydig cells, also known as interstitial cells, are located in the testis and are responsible for producing testosterone in response to luteinizing hormone (LH) stimulation.
4. Connect the function of Leydig cells to testosterone production: Leydig cells synthesize testosterone, which is crucial for male secondary sexual characteristics and spermatogenesis.
5. Conclude that the correct answer is Leydig cells, as they are the specific cells in the testis responsible for testosterone production.