Reproductive System Advanced Questions PDF

Reproductive system - advanced 1. How many spermatozoa are produced from each spermatogonium? a) 32 b) 4 c) 8 d) 16 2. What is the main role of progesterone during the luteal phase of the ovarian cycle? a) Prepare the endometrium for implantation of the embryo b) Stimulate follicle developme...

Reproductive system - advanced 1. How many spermatozoa are produced from each spermatogonium? a) 32 b) 4 c) 8 d) 16 2. What is the main role of progesterone during the luteal phase of the ovarian cycle? a) Prepare the endometrium for implantation of the embryo b) Stimulate follicle development c) Stimulate production of oocytes d) Initiate shedding of the endometrium 3. Which is the common precursor for all sex hormones? a) Cholesterol b) Cortisol c) Aldosterone d) Estradiol 4. Sertoli cells (sustentacular cells) perform all of the following functions EXCEPT: a) Secretion of androgens b) Maintenance of the blood-testis barrier c) Secretion of Inhibin d) Secretion of androgen-binding protein 5. At which stage of life are testosterone levels highest? a) Childhood b) Puberty c) Adult life d) Post-andropausal life 6. What is the main stimulus for ovulation? a) Release of progesterone from the ovaries b) Release of inhibin from the ovaries c) Release of luteinising hormone (LH) from the pituitary gland d) Release of Gonadotropin-releasing hormone (GRH) from the hypothalamus 7. What is the correct order of stages of follicle development in the ovarian cycle a) corpus luteum - primary oocyte - primary follicle - ovulation - mature follicle b) primary oocyte - primary follicle - mature follicle - ovulation - corpus luteum c) ovulation - primary follicle - mature follicle - primary oocyte - corpus luteum d) primary oocyte - primary follicle - mature follicle - corpus luteum - ovulation 8. What happens to hormone levels during menstruation? a) Estradiol and progesterone fall b) Estradiol rises, progesterone falls c) Estradiol falls, progesterone rises d) Estradiol and progesterone rise 9. Which hormone is responsible for the inhibition of follicle stimulating hormone (FSH) release from the pituitary gland? a) Progesterone b) Estrogen c) Inhibin d) Relaxin 10. Which sex hormone has a pronounced effect on skeletal muscle growth? a) Estrogen b) Inhibin c) Testosterone d) Progesterone 11. During the early portion of pregnancy, the corpus luteum secretes: a) progesterone b) human chorionic gonadotropin (hCG) c) prolactin d) testosterone 12. In the follicular stage of the ovarian cycle, the ovary is: a) undergoing atresia b) forming a corpus luteum c) releasing a mature egg d) maturing a follicle 13. If the duration of the ovarian cycle is 30 days, what is the duration of the luteal phase? a) 14 days b) 16 days c) 30 days d) 28 days 14. What effect would a blockage of progesterone receptors in the uterus have on the endometrium? a) Inhibition of development b) Stimulation of development c) Shedding of endometrium d) Increased vascularisation 15. Home-use kits for determining a woman's fertile period depend on the presence of which hormone in the urine? a) Human chorionic gonadotropin (hCG) b) Progesterone c) Folicle stimulating hormone (FSH) d) Luteinising hormone (LH) 16. In human males, testosterone is produced mainly by the: a) Leydig cells b) Sertoli cells c) Seminiferous tubules d) Epididymis 17. Which of the following is NOT one of the major differences between gamete production in males and females? a) Males produce gametes throughout life, female gamete production ceases at menopause b) Males produce many gametes at once, females produce only one gamete at a time c) Males release mature gametes, females release immature gametes d) Male gametes are produced by meiosis, female gametes are produced by mitosis 18. Why does the vaginal environment have an acidic pH? a) To facilitate sperm movement b) To prevent infections c) To facilitate the exchange betwen mucus membranes and circulation d) To neutralise alkaline seminiferous fluid 19. What would be the consequence of the blockage of both uterine tubes? a) Impaired hormone production b) Pregnancy c) Pain d) Sterility 20. Which of the following is NOT a male secondary sexual characteristic? a) An increased incidence of acne b) A deep voice c) A beard d) Increased fat in the buttocks