Q1. Which of the following structures is responsible for producing sperm in the male reproductive system?
a) Testis
b) Epididymis
c) Prostate gland
d) Vas deferens
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Correct Answer: a) Testis
Explanation: The testes, located in the scrotum, are responsible for producing sperm through a process called spermatogenesis. Spermatogenesis occurs in the seminiferous tubules within the testes, where immature sperm cells undergo multiple stages of development and maturation. Sperm are then stored and further matured in the epididymis before being ejaculated during sexual intercourse.
Q2. What is the primary function of the prostate gland in the male reproductive system?
a) Production of sperm
b) Secretion of seminal fluid
c) Storage of sperm
d) Passage for sperm to enter the urethra
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Correct Answer: b) Secretion of seminal fluid
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.
Q3. Which part of the male reproductive system is responsible for carrying sperm from the epididymis to the ejaculatory duct?
a) Epididymis
b) Seminal vesicles
c) Vas deferens
d) Bulbourethral gland
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Correct Answer: c) Vas deferens
Explanation: The vas deferens, also known as the ductus deferens, is a long, muscular tube that transports sperm from the epididymis to the ejaculatory duct during ejaculation. It serves as a passageway for sperm to travel from the testes to the urethra, where they are expelled during ejaculation.
Q4. What is the function of the seminal vesicles in the male reproductive system?
a) Production of sperm
b) Storage and maturation of sperm
c) Secretion of alkaline fluid to neutralize acidic vaginal environment
d) Secretion of seminal fluid
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Correct Answer: d) Secretion of seminal fluid
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.
Q5. Which of the following hormones stimulates the production of testosterone in the testes?
a) Follicle-stimulating hormone (FSH)
b) Luteinizing hormone (LH)
c) Estrogen
d) Progesterone
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Correct Answer: b) Luteinizing hormone (LH)
Explanation: Luteinizing hormone (LH), released by the anterior pituitary gland, stimulates the interstitial cells (Leydig cells) in the testes to produce and release testosterone. Testosterone is the primary male sex hormone responsible for the development and maintenance of male reproductive tissues and secondary sexual characteristics.
Q6. What is the function of the scrotum in the male reproductive system?
a) Production of sperm
b) Storage of sperm
c) Regulation of testicular temperature
d) Secretion of seminal fluid
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Correct Answer: c) Regulation of testicular temperature
Explanation: The scrotum is a pouch of skin located outside the body, below the penis, that houses the testes. Its primary function is to regulate the temperature of the testes to ensure optimal conditions for sperm production (spermatogenesis). The muscles in the scrotum contract and relax to adjust the distance between the testes and the body, helping to maintain a slightly lower temperature than the rest of the body.
Q7. What is the name of the structure that carries urine and semen out of the body in males?
a) Ureter
b) Urethra
c) Vas deferens
d) Epididymis
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Correct Answer: b) Urethra
Explanation: The urethra is a tube that carries both urine from the bladder and semen from the reproductive system out of the body through the penis. It serves as a common passageway for both urine excretion and ejaculation in males.
Q8. Which of the following is NOT a component of semen?
a) Sperm
b) Prostatic fluid
c) Seminal fluid
d) Bulbourethral fluid
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Correct Answer: d) Bulbourethral fluid
Explanation: While the bulbourethral glands (Cowper’s glands) secrete a clear, viscous fluid known as pre-ejaculate or pre-cum, it is not a major component of semen. Semen primarily consists of sperm, prostatic fluid, and seminal fluid, all of which contribute to the nourishment, protection, and transport of sperm during ejaculation.
Q9. What is the function of the bulbourethral glands 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 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, preparing the urethra for the passage of sperm during ejaculation.
Q10. Which of the following statements about spermatogenesis is true?
a) It occurs in the vas deferens.
b) It results in the formation of one egg cell.
c) It produces four sperm cells from one diploid cell.
d) It involves only one round of cell division.
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Correct Answer: c) It produces four sperm cells from one diploid cell.
Explanation: Spermatogenesis is the process of sperm cell formation in the male reproductive system. It occurs in the seminiferous tubules of the testes and involves multiple stages of cell division and maturation. During spermatogenesis, one diploid germ cell undergoes two rounds of division to produce four haploid sperm cells with half the number of chromosomes.