Male Reproductive System Questions PDF

**Section I: Anatomy and Functions of the Male Reproductive System** **1. What is the main reason the testes are located outside the body cavity?**\ A) To protect sperm from immune attack\ B) To increase testosterone production\ C) To maintain a temperature lower than body temperature for sperm dev...

**Section I: Anatomy and Functions of the Male Reproductive System** **1. What is the main reason the testes are located outside the body cavity?**\ A) To protect sperm from immune attack\ B) To increase testosterone production\ C) To maintain a temperature lower than body temperature for sperm development\ D) To enhance blood flow to the testis\ E) To protect against infections\ **Correct Answer:** C **2. What type of gland are the testes classified as when producing testosterone?**\ A) Endocrine gland\ B) Exocrine gland\ C) Mixed gland\ D) Sebaceous gland\ E) Sudoriferous gland\ **Correct Answer:** A **3. Which structure in the testes is the site of spermatogenesis?**\ A) Rete testis\ B) Seminiferous tubules\ C) Vas deferens\ D) Tunica albuginea\ E) Epididymis\ **Correct Answer:** B **4. What is the function of Leydig (interstitial) cells?**\ A) Form the blood-testis barrier\ B) Nourish developing sperm cells\ C) Produce testosterone in response to LH\ D) Transport sperm from the seminiferous tubules\ E) Produce seminal fluid\ **Correct Answer:** C **5. Which structure provides a protective covering and divides the testes into lobules?**\ A) Tunica albuginea\ B) Dartos muscle\ C) Epididymis\ D) Seminiferous tubules\ E) Vas deferens\ **Correct Answer:** A **Section II: Scrotal Muscles and Temperature Regulation** **6. What is the primary role of the dartos muscle?**\ A) Elevate the testes\ B) Wrinkle the scrotal skin to reduce heat loss\ C) Transport sperm through the duct system\ D) Surround the spermatic cord\ E) Lubricate the urethra\ **Correct Answer:** B **7. Which muscle elevates the testes in cold temperatures to regulate sperm development?**\ A) Dartos muscle\ B) Cremaster muscle\ C) Internal oblique muscle\ D) Smooth muscle of the scrotum\ E) Tunica albuginea\ **Correct Answer:** B **Section III: Duct System of the Male Reproductive System** **8. Where does sperm maturation occur?**\ A) Seminiferous tubules\ B) Epididymis\ C) Vas deferens\ D) Ejaculatory duct\ E) Prostate gland\ **Correct Answer:** B **9. What is the role of the efferent ductules?**\ A) Connect the vas deferens to the epididymis\ B) Transport sperm from the rete testis to the epididymis\ C) Facilitate sperm motility\ D) Secrete seminal fluid\ E) Store mature sperm\ **Correct Answer:** B **10. Which segment of the urethra passes through the urogenital diaphragm?**\ A) Prostatic urethra\ B) Membranous urethra\ C) Spongy (penile) urethra\ D) Epididymal urethra\ E) Vas deferens\ **Correct Answer:** B **Section IV: Accessory Glands** **11. What is the primary function of the seminal vesicles?**\ A) Produce sperm cells\ B) Secrete fluid rich in fructose and fibrinogen\ C) Lubricate the urethra during ejaculation\ D) Neutralize the acidic pH of the female vagina\ E) Secrete enzymes to liquefy semen\ **Correct Answer:** B **12. Which gland contributes 25-30% of semen volume and contains prostate-specific antigen?**\ A) Seminal vesicles\ B) Prostate gland\ C) Bulbourethral glands\ D) Epididymis\ E) Vas deferens\ **Correct Answer:** B **13. What is the function of the bulbourethral (Cowper's) glands?**\ A) Secrete a clear mucus-like fluid to lubricate the urethra\ B) Produce sperm cells\ C) Secrete fructose-rich seminal fluid\ D) Contribute enzymes to liquefy semen\ E) Store sperm before ejaculation\ **Correct Answer:** A **Section V: Spermatogenesis and Spermiogenesis** **14. Where does spermatogenesis occur?**\ A) Rete testis\ B) Seminiferous tubules\ C) Epididymis\ D) Vas deferens\ E) Tunica albuginea\ **Correct Answer:** B **15. Which stage of spermatogenesis involves haploid secondary spermatocytes?**\ A) Spermatogonia\ B) Primary spermatocytes\ C) Secondary spermatocytes\ D) Spermatids\ E) Mature sperm\ **Correct Answer:** C **16. What is the main purpose of spermiogenesis?**\ A) Production of sperm cells\ B) Differentiation of spermatids into mature sperm\ C) Increase testosterone production\ D) Create haploid gametes\ E) Nourish sperm cells\ **Correct Answer:** B **17. What is the ploidy of mature sperm cells?**\ A) Diploid (2n)\ B) Haploid (n)\ C) Tetraploid (4n)\ D) Polyploid\ E) Aneuploid\ **Correct Answer:** B **18. Which part of the sperm contains enzymes needed to penetrate an egg?**\ A) Head\ B) Midpiece\ C) Tail\ D) Acrosome\ E) Mitochondria\ **Correct Answer:** D **Section VI: Composition of Semen** **19. Which gland produces the majority of seminal fluid?**\ A) Prostate gland\ B) Seminal vesicles\ C) Bulbourethral glands\ D) Epididymis\ E) Testis\ **Correct Answer:** B **20. What is the primary energy source for sperm found in seminal fluid?**\ A) Glucose\ B) Fructose\ C) Protein\ D) Lipids\ E) ATP\ **Correct Answer:** B **Section VII: Hormonal Control of Male Reproductive System** **21. What triggers the release of testosterone in the testes?**\ A) Follicle-stimulating hormone (FSH)\ B) Luteinizing hormone (LH)\ C) Prolactin\ D) Gonadotropin-releasing hormone (GnRH)\ E) Estrogen\ **Correct Answer:** B **22. What hormone stimulates sperm formation?**\ A) LH\ B) FSH\ C) Testosterone\ D) Prolactin\ E) GnRH\ **Correct Answer:** B **23. What hormone is primarily responsible for male secondary sexual characteristics?**\ A) FSH\ B) Testosterone\ C) Progesterone\ D) GnRH\ E) Prolactin\ **Correct Answer:** B **Section VIII: Aging and the Male Reproductive System** **24. Which of the following is a common effect of aging on the male reproductive system?**\ A) Increase in sperm cell production\ B) Decrease in the size of the testes\ C) Increase in testosterone levels\ D) Enhanced sexual performance\ E) Thickening of seminiferous tubule walls\ **Correct Answer:** B **25. What condition involves an enlarged prostate gland that affects urination?**\ A) Testicular atrophy\ B) Benign prostatic hyperplasia (BPH)\ C) Prostatitis\ D) Epididymitis\ E) Varicocele\ **Correct Answer:** B **Section IX: Hormonal Control (Continued)** **26. Which hormone is secreted by the placenta during fetal development to stimulate testosterone production in male fetuses?**\ A) Luteinizing hormone (LH)\ B) Human chorionic gonadotropin (hCG)\ C) Follicle-stimulating hormone (FSH)\ D) Progesterone\ E) Estrogen\ **Correct Answer:** B **27. What occurs during puberty to initiate male reproductive function?**\ A) Testosterone inhibits GnRH secretion\ B) Increased sensitivity of the pituitary to testosterone\ C) GnRH secretion increases, stimulating FSH and LH release\ D) Sperm production decreases temporarily\ E) Prostate gland enlarges immediately\ **Correct Answer:** C **28. What effect does elevated FSH have on the male reproductive system?**\ A) Increases testosterone production\ B) Stimulates spermatogenesis in the seminiferous tubules\ C) Promotes the release of GnRH\ D) Inhibits Leydig cell function\ E) Enhances muscle growth\ **Correct Answer:** B **29. Which cells produce testosterone in response to luteinizing hormone (LH)?**\ A) Sertoli cells\ B) Leydig cells\ C) Spermatogonia\ D) Spermatozoa\ E) Efferent ductules\ **Correct Answer:** B **30. What is the role of GnRH in the male reproductive system?**\ A) Directly stimulates sperm production\ B) Inhibits LH and FSH secretion\ C) Stimulates the anterior pituitary to release LH and FSH\ D) Increases testosterone sensitivity in Sertoli cells\ E) Prevents sperm maturation\ **Correct Answer:** C **Section X: Spermatogenesis and Spermiogenesis (Continued)** **31. What is the primary purpose of spermatogenesis?**\ A) Produce haploid gametes for fertilization\ B) Increase the size of testes during puberty\ C) Maintain diploid chromosome numbers in gametes\ D) Produce testosterone\ E) Nourish sperm cells\ **Correct Answer:** A **32. During spermatogenesis, which cells divide by mitosis to produce primary spermatocytes?**\ A) Spermatogonia\ B) Secondary spermatocytes\ C) Spermatids\ D) Sertoli cells\ E) Leydig cells\ **Correct Answer:** A **33. What happens to spermatids during spermiogenesis?**\ A) They undergo mitosis\ B) They develop acrosomes, flagella, and lose excess cytoplasm\ C) They become diploid primary spermatocytes\ D) They move directly to the ejaculatory duct\ E) They produce testosterone\ **Correct Answer:** B **34. Which stage of spermatogenesis produces haploid secondary spermatocytes?**\ A) First meiotic division (meiosis I)\ B) Second meiotic division (meiosis II)\ C) Spermiogenesis\ D) Mitosis of spermatogonia\ E) Differentiation of spermatids\ **Correct Answer:** A **Section XI: Anatomy of the Duct System (Continued)** **35. Which structure stores sperm until ejaculation?**\ A) Seminiferous tubules\ B) Epididymis\ C) Vas deferens\ D) Ejaculatory duct\ E) Prostate gland\ **Correct Answer:** B **36. What structure connects the vas deferens to the prostatic urethra?**\ A) Epididymis\ B) Rete testis\ C) Ejaculatory duct\ D) Bulbourethral gland\ E) Membranous urethra\ **Correct Answer:** C **37. What is the function of the spongy (penile) urethra?**\ A) Transport urine and semen to the external urethral orifice\ B) Collect sperm from the rete testis\ C) Secrete enzymes to protect sperm\ D) Neutralize the acidic pH of the vagina\ E) Store mature sperm\ **Correct Answer:** A **38. Which part of the epididymis connects directly to the vas deferens?**\ A) Head\ B) Body\ C) Tail\ D) Proximal segment\ E) Rete testis\ **Correct Answer:** C **Section XII: Semen and Accessory Glands (Continued)** **39. Which gland produces fluid that neutralizes acidic urine in the urethra?**\ A) Seminal vesicles\ B) Prostate gland\ C) Bulbourethral glands\ D) Epididymis\ E) Testis\ **Correct Answer:** C **40. Which gland secretes a fluid rich in fructose to provide energy for sperm?**\ A) Seminal vesicles\ B) Prostate gland\ C) Bulbourethral glands\ D) Vas deferens\ E) Epididymis\ **Correct Answer:** A **41. What is the role of fibrinolysin in semen?**\ A) Coagulate sperm for protection\ B) Liquefy semen after ejaculation to allow sperm to swim\ C) Provide nutrients to sperm\ D) Neutralize the pH of the urethra\ E) Enhance sperm motility immediately\ **Correct Answer:** B **42. What is the typical pH range of seminal fluid?**\ A) Acidic (4.0--5.0)\ B) Neutral (6.0--7.0)\ C) Alkaline (7.2--8.0)\ D) Highly alkaline (8.5--9.5)\ E) Acidic (3.5--4.5)\ **Correct Answer:** C **Section XIII: Male Sexual Response and Ejaculation** **43. What triggers emission during ejaculation?**\ A) Parasympathetic signals\ B) Sympathetic signals\ C) Somatic motor output\ D) Reflex signals from the pudendal nerve\ E) Local hormonal secretion\ **Correct Answer:** B **44. Which sphincter contracts to prevent semen and urine from mixing during ejaculation?**\ A) External urethral sphincter\ B) Internal urethral sphincter\ C) Prostatic sphincter\ D) Epididymal sphincter\ E) Spongy urethral sphincter\ **Correct Answer:** B **45. What causes rhythmic contractions during ejaculation?**\ A) Increased testosterone levels\ B) Reflex activation of skeletal muscles at the base of the penis\ C) Parasympathetic stimulation of the prostate gland\ D) Release of seminal vesicle secretions\ E) Inhibition of Leydig cell function\ **Correct Answer:** B **Section XIV: Effects of Aging on Male Reproductive System** **46. What effect does aging typically have on the prostate gland?**\ A) Decrease in size\ B) Increase in smooth muscle cells\ C) Thickening of the epithelial lining\ D) Enhanced blood flow\ E) Increase in testosterone secretion\ **Correct Answer:** C **47. What is a common reproductive issue in aging males?**\ A) Increased sperm count\ B) Testicular hypertrophy\ C) Decreased rate of sperm production\ D) Reduced secretion of seminal vesicle fluid\ E) Increased rate of testosterone production\ **Correct Answer:** C **48. What condition often causes difficulty in urination for older men?**\ A) Prostatitis\ B) Testicular torsion\ C) Benign prostatic hyperplasia (BPH)\ D) Epididymitis\ E) Hydrocele\ **Correct Answer:** C **Section XV: Miscellaneous** **49. Which part of the sperm contains mitochondria to provide energy for motility?**\ A) Head\ B) Acrosome\ C) Midpiece\ D) Tail\ E) Nucleus\ **Correct Answer:** C **50. What is the primary function of the acrosome in sperm?**\ A) Store genetic material\ B) Provide energy for motility\ C) Contain enzymes to penetrate the oocyte\ D) Neutralize the acidic environment of the vagina\ E) Enhance sperm maturation in the epididymis\ **Correct Answer:** C