Human Reproduction

Topics in this chapter

• Male Reproductive System and Spermatogenesis
• Menstrual Cycle and Oogenesis
• Fertilisation and Early Embryonic Development
• Pregnancy, Placenta and Childbirth
• Contraception and Assisted Reproduction

Cheat sheet

Practice questions

1. Question 1Q-2538F7

   Which statement correctly describes hormonal regulation of spermatogenesis in human males?

   1. A.FSH acts on Leydig cells to stimulate testosterone secretion.
   2. B.LH acts on Leydig cells to stimulate testosterone secretion.
   3. C.GnRH acts directly on seminiferous tubules to produce spermatozoa.
   4. D.Testosterone inhibits the secretion of both LH and FSH only in females.
   See the answer and solution
2. Question 2Q-64D804

   Which combination of events is characteristic of ovulation in a healthy human menstrual cycle?

   1. A.A surge of LH, release of a secondary oocyte, and formation of the corpus luteum from the ruptured follicle
   2. B.A surge of progesterone, release of a primary oocyte, and degeneration of the corpus luteum
   3. C.A fall in LH, release of an ovum completed through meiosis II, and formation of the corpus albicans
   4. D.A surge of FSH, release of a zygote, and transformation of the corpus luteum into a follicle
   See the answer and solution
3. Question 3Q-68B676

   Which event occurs immediately after a sperm enters the secondary oocyte during human fertilisation?

   1. A.The secondary oocyte completes meiosis II and forms the ovum and the second polar body.
   2. B.The zygote undergoes implantation in the uterine endometrium.
   3. C.The sperm nucleus undergoes meiosis to form haploid sperm nuclei.
   4. D.The embryo immediately differentiates into ectoderm, mesoderm and endoderm.
   See the answer and solution
4. Question 4Q-F32BEF

   Which hormone secreted by the trophoblast shortly after implantation maintains the corpus luteum during the early stages of pregnancy?

   1. A.Follicle-stimulating hormone
   2. B.Human chorionic gonadotropin
   3. C.Oxytocin
   4. D.Prolactin
   See the answer and solution
5. Question 5Q-2CF38F

   Which sequence correctly represents the passage of sperm from its site of formation to the duct that carries it toward the urethra?

   1. A.Seminiferous tubules → rete testis → vasa efferentia → epididymis → vas deferens
   2. B.Epididymis → seminiferous tubules → rete testis → vas deferens → vasa efferentia
   3. C.Seminiferous tubules → epididymis → rete testis → vasa efferentia → vas deferens
   4. D.Rete testis → seminiferous tubules → epididymis → vasa efferentia → vas deferens
   See the answer and solution