Question

Testosterone is produced by
A. Leydig cells
B. Interstitial cells
C. Seminiferous tubules
D. Both A and B

Answer 1

Hint:Male reproductive system consists of a pair of the testis which is located in the scrotal sac (which is present outside of the abdomen to maintain a temperature lower than the body which is optimum for the preparation of sperms in testis) of male individuals.

Complete answer:
In male reproductive testis performs a dual function. They are the primary sex organs in male individuals. And also an endocrine gland in the body.
The testis is composed of seminiferous tubules and stromal or interstitial tissue.
The Leydig cells or interstitial cells which are present in the intertubular space produce a group of hormones called androgens. One of the important androgens is testosterone.
Androgens regulate the development, maturation, and function of the male accessory sex organs like epididymis, seminal vesicle, prostate gland, etc.
These hormones also stimulate muscular growth, growth of facial and axillary hair, aggressiveness, and the low pitch of voice, etc.
Androgen plays a major stimulatory role in the process of spermatogenesis which means the formation of spermatozoa.
Androgens act on the central neural system and influence male sexual behavior. These hormones produce anabolic or synthetic effects on protein and carbohydrate metabolism.

So, the correct answer is an option (D).

Note:Seminiferous tubules are lined on their inside by two types of cells called male germ cells and Sertoli cells.
The male germ cells undergo meiotic division finally leading to sperm formation.
While the Sertoli cells provide nutrition to the germ cells.
The male accessory glands include paired seminal vesicles, prostate gland, and paired bulbourethral glands.