Q11. Which of the following is NOT a part of the male reproductive system?
a) Ovary
b) Testis
c) Vas deferens
d) Prostate gland
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Correct Answer: a) Ovary
Explanation: The ovary is a female reproductive organ responsible for producing eggs (ova) and female sex hormones. It is not part of the male reproductive system. The other options listed are components of the male reproductive system involved in the production, transport, and ejaculation of sperm.
Q12. What is the function of the epididymis in the male reproductive system?
a) Production of sperm
b) Storage and maturation of sperm
c) Secretion of seminal fluid
d) Passage for sperm to enter the urethra
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Correct Answer: b) Storage and maturation of sperm
Explanation: The epididymis is a tightly coiled tube located on the surface of each testis in the male reproductive system. Its main function is to store and mature sperm cells produced in the testes. Sperm spend several days in the epididymis, where they gain motility and become capable of fertilizing an egg.
Q13. What is the primary function of testosterone in the male reproductive system?
a) Production of sperm
b) Stimulation of secondary sexual characteristics
c) Secretion of seminal fluid
d) Passage for sperm to enter the urethra
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Correct Answer: b) Stimulation of secondary sexual characteristics
Explanation: Testosterone, the primary male sex hormone, plays a crucial role in stimulating the development and maintenance of secondary sexual characteristics in males. These characteristics include the growth of facial and body hair, deepening of the voice, development of muscle mass and strength, and enlargement of the male reproductive organs.
Q14. Which of the following structures is responsible for the production and secretion of testosterone?
a) Seminiferous tubules
b) Interstitial cells (Leydig cells)
c) Sertoli cells
d) Prostate gland
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Correct Answer: b) Interstitial cells (Leydig cells)
Explanation: Interstitial cells, also known as Leydig cells, are located in the spaces between the seminiferous tubules within the testes. They are responsible for the production and secretion of testosterone in response to luteinizing hormone (LH) released by the anterior pituitary gland. Testosterone plays a crucial role in regulating spermatogenesis and the development of male reproductive tissues and secondary sexual characteristics.
Q15. Which part of the male reproductive system secretes a fluid that lubricates the urethra and neutralizes acidity in the urethra and vagina?
a) Seminal vesicles
b) Prostate gland
c) Bulbourethral glands
d) Vas deferens
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Correct Answer: c) Bulbourethral glands
Explanation: The bulbourethral glands, also known as Cowper’s glands, are a pair of small glands located beneath the prostate gland in the male reproductive system. Their primary function is to secrete a clear, alkaline fluid that neutralizes any acidic urine residue in the urethra and lubricates the urethral walls, reducing friction during ejaculation.
Q16. Which of the following is NOT a function of the seminal vesicles in the male reproductive system?
a) Production of sperm
b) Secretion of seminal fluid
c) Nourishment of sperm
d) Enhancement of sperm motility
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Correct Answer: a) Production of sperm
Explanation: The seminal vesicles are a pair of glands located near the base of the bladder in the male reproductive system. Their primary function is to secrete a fluid rich in fructose, enzymes, and prostaglandins, which collectively make up seminal fluid. Seminal fluid provides nutrients and energy to sperm, enhances their motility, and helps neutralize the acidic environment of the female reproductive tract.
Q17. Which of the following statements about the vas deferens is true?
a) It transports sperm from the testes to the prostate gland.
b) It carries urine from the bladder to the urethra.
c) It is a gland that produces seminal fluid.
d) It is a muscular tube that contracts to propel sperm during ejaculation.
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Correct Answer: d) It is a muscular tube that contracts to propel sperm during ejaculation.
Explanation: The vas deferens, also known as the ductus deferens, is a long, muscular tube that carries sperm from the epididymis to the ejaculatory duct during ejaculation. It is lined with smooth muscle tissue that contracts rhythmically to propel sperm forward through peristaltic contractions, aiding in the process of ejaculation.
Q18. Which of the following is a function of the prostate gland in the male reproductive system?
a) Production of sperm
b) Secretion of alkaline fluid to neutralize acidic vaginal environment
c) Storage and maturation of sperm
d) Passage for sperm to enter the urethra
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Correct Answer: b) Secretion of alkaline fluid to neutralize acidic vaginal environment
Explanation: The prostate gland is a walnut-sized gland located below the bladder in males. Its primary function is to produce and secrete a milky, alkaline fluid known as prostatic fluid, which makes up a significant portion of semen. Prostatic fluid contains enzymes and nutrients that help nourish and protect sperm, as well as enhance their motility. Additionally, the alkaline nature of prostatic fluid helps neutralize the acidic environment of the female reproductive tract, enhancing sperm survival and motility.
Q19. Which of the following hormones is responsible for stimulating the production of sperm in the testes?
a) Follicle-stimulating hormone (FSH)
b) Luteinizing hormone (LH)
c) Testosterone
d) Estrogen
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Correct Answer: a) Follicle-stimulating hormone (FSH)
Explanation: Follicle-stimulating hormone (FSH), released by the anterior pituitary gland, stimulates the Sertoli cells within the seminiferous tubules of the testes to support spermatogenesis—the process of sperm cell formation. FSH acts synergistically with testosterone to regulate spermatogenesis and maintain normal sperm production levels.
Q20. What is the function of the epididymis in the male reproductive system?
a) Production of sperm
b) Storage and maturation of sperm
c) Secretion of seminal fluid
d) Passage for sperm to enter the urethra
Show Answer
Correct Answer: b) Storage and maturation of sperm
Explanation: The epididymis is a tightly coiled tube located on the surface of each testis in the male reproductive system. Its main function is to store and mature sperm cells produced in the testes. Sperm spend several days in the epididymis, where they gain motility and become capable of fertilizing an egg.