Question 6

Both FSH and LH regulate testicular activity.

Testicular activity is primarily regulated by Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH), both of which are secreted by the anterior pituitary gland and play crucial roles in male reproductive function.

A) FSH

Follicle-Stimulating Hormone (FSH) is important for spermatogenesis, stimulating the Sertoli cells in the testes. However, while FSH is a key regulator of testicular function, it does not act alone, and thus it is not the complete answer to the question.

B) LH

Luteinizing Hormone (LH) is essential for testosterone production as it stimulates Leydig cells in the testes. Like FSH, LH is critical for testicular activity, but it is not sufficient on its own to encompass the full regulatory mechanism, making it an incomplete answer.

C) GH

Growth Hormone (GH) primarily regulates growth and metabolism and does not directly influence testicular activity. Therefore, it is not relevant to the regulation of the testes and does not answer the question.

D) Both FSH and LH

Both FSH and LH are vital for regulating testicular activity as they work together to ensure proper spermatogenesis and testosterone production. This option accurately reflects the hormonal interplay necessary for testicular function.

Conclusion

The correct answer is "Both FSH and LH," as both hormones are integral to the regulation of testicular activity. Options A and B each describe important aspects of testicular function but fail to encompass the complete hormonal regulation. Option C is irrelevant to the question, confirming that D is the only comprehensive answer.