Male Reproductive System

  1. Function of Testes?
    Produces gametes and secrete hormones
  2. Function of the system of ducts?
    • Store sperm
    • Assists in their maturation
    • delivers to exterior
  3. What are the accessory sex glands?
    Seminal vesicles, prostate gland, bulbourethral glands
  4. Function of Accessory sex glands?
    Adds secretions to semen
  5. What are the supporting structures?
    scrotum and penis
  6. Scrotum function and structures
    • Houses testes
    • dartos muscle & cremaster muscle regulate temperature, raises scrotum when contracted, lowers when relaxed
  7. Where does the spermatic cord enter?
    Enters the pelvic cavity through inguinal canals
  8. What is the site of Inguinal hernias?
    Spermatic cord
  9. Seminal vesicles secrete what in sperm?
    Secrete alkaline, viscous fluid containing fructose

    Secrete Prostaglandins - stimulate motility of sperm and muscle contractions within female tract
  10. What do Prostaglandins do?
    stimulate motility of sperm and muscle contractions within female tract
  11. What do the prostate secrete in semen?
    Secretes milky fluid that increases sperm viability and mobility.

    Secretes proteolytic enzymes that digest proteins that interfere with sperm and help clear trail when inside female
  12. What do proteolytic enzymes do?
    digest proteins that interfere with sperm and help clear trail when inside female
  13. What do the Bulbourethral glands secrete and do?
    Alkaline fluid- neutralizes acids in vagina

    Mucus- lubricates end of penis and lining of urethra
  14. The Dartos muscle does what?
    Raises to regulate temperature
  15. what does the cremaster muscle do?
    Raises scrotum
  16. What brings semen to the testes?
    Ductus vas deferens, Autonomic nerve, testicular artery, lymphatic vessel
  17. What does erectile tissue consist of?
    Corpora cavernosa penis, spongy urethra, corpus spongiosum penis
  18. What forms the cremaster muscle?
    Internal oblique muscle
  19. Testes develop where during development?
    Near kidney and descends near 7th month of fetal development
  20. The spermatic cord consists of what?
    • Testicular artery & Vein
    • Lymphatic vessels
    • Nerves
    • Vas Deferens
    • Cremaster muscle
  21. What does the Vas Deferens do?
    Transports sperm into pelvis
  22. Where is the vas deferens located?
    In the spermatic cord
  23. The Epididymis does what?
    • Storages and Matures sperm
    • acquires motility & ability to fertilize
    • reabsorbs degenerate sperm
  24. What do the seminiferous tubules do?
    site of spermatogenisis-miosis that produces sperm
  25. What structures causes an erection?
    Parasympathetic fibers- causes production of Nitric Oxide (NO) in erectile tissue - potent vasodilator

    Vasodialation of arterioles
  26. What does NO do?
    It is a potent vasodialator that cause an erection
  27. Which erectile tissue surrounds the urethra?
    Corpus spongiosum
  28. Where does sperm get produced?
    In the cells of seminferous tubules
  29. What do sertoli cells do?
    • Form blood-testis barrier
    • Nourish spermatogenic cells
    • Phagocytize excess spermatid cytoplasm
    • Release sperm into lumen
    • Produce fluid for sperm transport
    • Secrete Inhibin which inhibits FSH
  30. What hormone inhibits FSH?
  31. What hormone is found in steroli cells?
  32. What hormone is found in Leydig cells?
  33. Where are Leydig cells found?
    in spaces between seminiferous tubules
  34. What do leydig cells do?
    Secrete testosterone
  35. What are the steps of Spermatogenesis?
    • 1. Mitosis - divides
    • 2. Meosis 1 - replicates DNA, tetrad formation, crossing over
    • 3. Meosis 2 - secondary spermatocytes each have 2 chromatids = spermatids
    • 4. Spermiogenesis - spermatids become spermatozoa
  36. What allows sperm to fertilize?
    The Acrosome contains enzymes that allow to fertilize
  37. What Hormone is produced at puberty and what does it do?
    GnRH - produces FSH
  38. What does FSH do?
    Simulates spermatogensis with testosterone
  39. Negative Feedback Stimulus
    Increased/Decreased blood level of testosterone
  40. Negative Feedback Receptors
    Hypothalamus-secretes GnRH
  41. Negative Feedback Control Center
    Anterior pituitary gonadotrophs
  42. Negative Feedback Effectors
    Leydig cells in testes produce more/less testosterone
  43. Negative Feedback response
    Decrease/increase of blood level of testosterone
Card Set
Male Reproductive System
Male Reproductive System