Question

Given below are two statements:
Statement (I) : Sertoli cells secrete ABP, Inhibin, Estrogen and Activin.
Statement (II) : Release of spermatozoa into the lumen of semineferous tubules is known as Spermiogenesis.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

Be careful not to confuse these three similar-sounding terms: 1. Spermatogenesis: The entire process of sperm development.
2. Spermiogenesis: The physical maturation of spermatids into spermatozoa.
3. Spermiation: The release of sperm into the tubule lumen.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
This question covers spermatogenesis, which is the process of sperm production in the male testes, and the role of supporting Sertoli cells.

Step 2: Detailed Explanation:
Statement (I) lists the secretions of Sertoli cells (somatic helper cells inside the seminiferous tubules).
Sertoli cells support developing sperm cells and secrete several important compounds:
- Androgen Binding Protein (ABP): Helps maintain high local levels of testosterone in the testes.
- Inhibin: Specifically suppresses the release of Follicle-Stimulating Hormone (FSH) from the pituitary gland.
- Activin: Stimulates FSH release.
- Estrogen: Produced in small amounts by converting testosterone using the aromatase enzyme.
Thus, Statement (I) is correct.
Statement (II) defines spermiogenesis.
Spermiogenesis is the physical transformation of round, immature spermatids into mature, elongated spermatozoa.
The release of these mature spermatozoa from Sertoli cells into the lumen of the seminiferous tubules is called spermiation, not spermiogenesis.
Thus, Statement (II) is incorrect.

Step 3: Final Answer:
Statement (I) is correct but Statement (II) is incorrect.