Question

One of the following cells secrete hormone
A. Cells of Leydig
B. Cells of sertoli
C. Primary spermatocytes
D. Secondary spermatocytes

Answer 1

Hint: All the above options are part of the male reproductive system. In a male reproductive system, each part serves a different function. The parts with endocrine cells secretes the necessary hormones for spermatogenesis and for developing secondary sexual characteristics in a male. Some parts act as a reservoir for providing nutrition to the male gametes.

Complete answer:
Option A Cells of Leydig: Cells of Leydig are endocrine cells that are present in the seminiferous tubules of testes. They secrete hormones such as testosterone and androgen. These hormones play a vital role in the development of secondary sexual characteristics in male.
So option A is correct.
Option B cells of sertoli: Sertoli cells are epithelial cells of the seminiferous tubules. They are not endocrine cells. Therefore, they cannot secrete hormones. Sertoli cells are supportive cells that are essential for spermatogenesis and testes development.
Option B is not correct.
Option C Primary spermatocytes: Primary spermatocytes are found in the inner lining of seminiferous tubules. They are formed from the spermatogonia. They are not endocrine cells. Therefore, they cannot secrete hormones.
Option C is not correct.
Option D Secondary spermatocytes: Secondary spermatocytes are formed from primary spermatocytes which further develop into sperms. They are not endocrine cells so they cannot secrete hormones.
Option D is not correct.

Therefore, Option A is the correct answer.

Note:
Endocrine glands are ductless glands that play an important role in maintaining homeostasis and to coordinate biological functions. These glands through endocrine cells secrete hormones in minute quantities. The hormones are secreted directly into the bloodstream and are carried to different parts of the body.