Interstitial cells Multiple Choice secrete seminal fluid. undergo meiosis to produce sperm cells. nourish developing sperm cells. secrete testosterone.
The correct answer and explanation is:
Correct Answer: d) Secrete testosterone.
Explanation (300 words):
Interstitial cells, also known as Leydig cells, are found in the spaces between the seminiferous tubules of the testes. These specialized cells play a crucial role in the male reproductive system, primarily through their endocrine function.
The primary role of interstitial (Leydig) cells is to secrete testosterone, the principal male sex hormone. Testosterone is essential for the development of male secondary sexual characteristics such as a deeper voice, facial and body hair growth, and increased muscle mass. It also supports libido and plays a vital role in the regulation of spermatogenesis — the process by which sperm cells are produced within the seminiferous tubules.
To clarify the roles of other structures and why the other options are incorrect:
- “Secrete seminal fluid”: This is incorrect because seminal fluid is primarily produced by the seminal vesicles, prostate gland, and bulbourethral glands — not by interstitial cells. Seminal fluid combines with sperm to form semen.
- “Undergo meiosis to produce sperm cells”: This is incorrect as well. Meiosis occurs in spermatogenic cells within the seminiferous tubules, not in interstitial cells. Spermatogonia undergo meiosis to become mature sperm cells (spermatozoa).
- “Nourish developing sperm cells”: This role is fulfilled by Sertoli cells, not interstitial cells. Sertoli cells are located inside the seminiferous tubules and support, nourish, and protect the developing sperm cells.
In summary, interstitial cells (Leydig cells) are endocrine cells whose main function is to produce and secrete testosterone, a hormone vital for male reproductive function and overall sexual development. They are stimulated by luteinizing hormone (LH), which is released by the anterior pituitary gland as part of the hypothalamic-pituitary-gonadal axis.