Question

Which of these associations is mismatched? a. interstitial cells - testosterone b. seminiferous tubules-sperm production c. vasa deferentia-seminal fluid production d. urethra-conducts sperm

Short answer

The mismatched association is option c: vasa deferentia - seminal fluid production. Vasa deferentia are involved in sperm transportation rather than seminal fluid production.

Step-by-step solution

Understand each association

In this step, we'll look at each option and analyze whether the association is correctly matched or not. a. interstitial cells - testosterone Interstitial cells, also known as Leydig cells, are indeed associated with testosterone production. b. seminiferous tubules-sperm production Seminiferous tubules are the site where sperm is produced, so this association is also correct. c. vasa deferentia-seminal fluid production Vasa deferentia, also known as ductus deferens, transport sperm from the epididymis to the ejaculatory ducts but are not responsible for seminal fluid production. d. urethra-conducts sperm The urethra, a tube that runs through the penis, does conduct sperm towards the exterior during ejaculation; thus, the association is correct.

Identify the mismatched association

As per our analysis in Step 1, option c is the mismatched association. The vasa deferentia are involved in sperm transportation rather than seminal fluid production.

Conclusion

Among the given options, the mismatched association is option c: vasa deferentia - seminal fluid production.

Key concepts

Interstitial Cells

Interstitial cells, also known as Leydig cells, are an essential component of the male reproductive system. Found in the testes, they play a crucial role in testosterone production.
Testosterone is a hormone responsible for developing male secondary sexual characteristics like muscle strength and facial hair.
This hormone also influences libido, bone density, and red blood cell production.

• Located between the seminiferous tubules
• Activated by luteinizing hormone (LH)
• Crucial for maintaining male reproductive health

Understanding the function of interstitial cells can provide insights into male hormonal health, including issues like low testosterone levels.

Seminiferous Tubules

Seminiferous tubules are tiny, coiled structures within the testes where sperm production, or spermatogenesis, takes place.
These tubules provide the environment necessary for spermatogonia to develop into mature sperm cells.

• Thousands of tubules are packed tightly in the testes
• Facilitate the essential stages of sperm development
• Contain Sertoli cells to support developing sperm

The health and function of seminiferous tubules are vital for fertility, as they directly influence sperm quality and quantity.

Vasa Deferentia

The vasa deferentia, singularly known as vas deferens, are muscular tubes that transport sperm from the epididymis to the ejaculatory ducts.
This process is vital for the successful delivery of sperm during ejaculation.

• Each testis has one vas deferens
• Approximately 30-45 cm in length
• Runs within the spermatic cord

It is important to note that while the vasa deferentia are involved in sperm conveyance, they do not produce seminal fluid, which is the role of other glands in the male reproductive system.

Urethra

The urethra in males is a multi-functional tube that carries urine from the bladder to the outside and also conducts sperm during ejaculation.
After sperm pass through the ejaculatory ducts, they enter the urethra.
This dual-purpose capability is unique and essential to male reproductive physiology.

• Exits through the tip of the penis
• Passes through the prostate gland
• Ensures separation of urine and seminal flow

The urethra's ability to effectively govern these two critical functions is vital for both urinary and reproductive health.