Which of the following roles is/are played by epididymis, vas deferens, seminal vesicles and prostate in male reproductive system of human?
Maturation and motility of sperms
Understanding Male Reproductive System Roles
The question asks about the functions of specific parts of the male reproductive system in humans: the epididymis, vas deferens, seminal vesicles, and prostate gland. These structures play crucial roles in the journey and preparation of sperm.
Roles of Key Structures
Let's examine the role of each part mentioned:
- Epididymis: This is a coiled tube located on the back of the testis. Sperm produced in the testes are immature and non-motile. They enter the epididymis where they undergo maturation. This maturation process includes gaining motility and the ability to fertilize an egg. Sperm are also stored here.
- Vas Deferens (or Ductus Deferens): This is a tube that transports mature sperm from the epididymis up to the ejaculatory duct. It acts primarily as a passageway for sperm transport during ejaculation.
- Seminal Vesicles: These glands contribute a significant portion (about 60-70%) of the fluid in semen. The fluid contains fructose, which provides energy for sperm motility, as well as prostaglandins and clotting factors. This secretion helps nourish the sperm and enhances their viability and motility.
- Prostate Gland: This gland contributes another fluid to the semen (about 20-30%). This fluid is slightly alkaline, which helps neutralize the acidity of the female reproductive tract, protecting the sperm. It also contains enzymes and citrate, contributing to sperm viability and motility.
Analyzing the Options based on Functions
Now let's look at the given options in light of the functions discussed:
- Spermatogenesis and maturation of sperms: Spermatogenesis (sperm production) occurs in the testes, not these accessory structures. The epididymis is involved in maturation, but not spermatogenesis. Therefore, this option is incorrect.
- Maturation and motility of sperms: The epididymis is where sperm mature and gain motility. The seminal vesicles and prostate gland contribute fluids containing substances like fructose and alkaline buffers that are essential for sperm motility and viability. Thus, these structures collectively support maturation and motility. This option aligns with the functions.
- Spermatogenesis and motility of sperms: As mentioned, spermatogenesis is the function of the testes. While motility is supported by these structures, including spermatogenesis makes this option incorrect.
- Motility of sperms only: While these structures are critical for sperm motility, the epididymis also plays a vital role in sperm maturation before they become fully motile and capable of fertilization. Therefore, this option is incomplete.
Considering the roles of the epididymis in maturation and the accessory glands (seminal vesicles and prostate) in providing fluid and nutrients that support sperm motility, the functions listed in option 2 accurately represent the collective roles of these structures in relation to sperm.
Revision Table: Male Reproductive System Components
| Structure | Primary Role(s) |
|---|---|
| Testes | Spermatogenesis (Sperm Production), Hormone Production (Testosterone) |
| Epididymis | Sperm Maturation, Sperm Storage |
| Vas Deferens | Sperm Transport |
| Seminal Vesicles | Contribute fluid (fructose, prostaglandins) to semen, support sperm motility/viability |
| Prostate Gland | Contribute alkaline fluid to semen, support sperm motility/viability |
| Bulbourethral Glands (Cowper's Glands) | Secrete lubricating fluid (pre-ejaculate) |
Additional Information on Sperm Function
Sperm motility is crucial for them to travel through the female reproductive tract and reach the egg for fertilization. The fluids from the seminal vesicles and prostate provide not only the medium for transport but also the energy source (fructose) and protection from the acidic environment of the vagina.
Sperm maturation in the epididymis involves several changes, including modifications to the sperm head and tail, which are necessary for forward motility (progressive motility) and the ability to undergo capacitation and the acrosome reaction later in the female tract.
Therefore, the process involves both maturation (mainly in the epididymis) and gaining/maintaining motility (supported by epididymis and accessory gland secretions).
Similar Questions
Which one of the following is the correct sequence of organs that occur in the path of urine flow in human body?
Which one of the following is the Structure of a cardiac muscle cell ?
Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
Which one of the following statements is correct?
Which one of the following body parts/organs of the human body does not have smooth muscles?
Which one of the following functions is not carried out by smooth endoplasmic reticulum?
Which one of the following statements regarding haemoglobin is correct?
Which one of the following viruses is responsible for the recent death of lions in Gir National Park?
Which one of the following is the special type of milk produced by a lactating mother, essential for the development of immune response of newborn baby in human?
Which one of the following elements is involved in the control of water content of the blood?
Important Questions from Human body
A resting person, usually has a pulse rate between ______ and ______ beats per minute
In humans, neck and head are joined by which joint ?
The human skeleton is composed of around ______ bones at birth.
During respiration, the gaseous exchange takes place in:
At which period of life, body undergoes changes leading to reproductive maturity?
