Chapter 1 - IVF babies for those who cannot conceive naturally

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  1. A fertilized ovum is called a?
  2. Sperm are produced in the?
    Seminiferous tubules
  3. What function do interstitial cells have?
    To secrete testosterone
  4. What job does the prostate have in sperm motility?
    Secretes a mucus that is an alkaline so acid from the urine is neutralized in the urethra
  5. An ovum is fertilized in the?
  6. A fertilized ovum is called a?
  7. Once the zygote divides a few times and travels down the oviduct it's called a?
  8. Where does the blastocyst implant itself?
  9. The ball of cells surrounding an immature ovum or oocyte is called a?
    Graafian Follice
  10. The first menstrual cycle is known as the?
  11. After the Graafian Follicle bursts during ovulation it continues to grow into a?
    Corpus luteum
  12. Pituitary gland is located in the?
    Base of the brain
  13. When the menstrual cycle starts a hormone called ________ is released
    Follicle stimulating hormone
  14. What is FSH's function?
    To stimulate the development of a Graafian follicle
  15. What hormone does the Graafian follicle produce and what is it's function?
    Oestrogen, thickens the endometrium wall, inhibits FSH secretion and stimulates LH to be produced in the pituitary gland
  16. What happens around day 11 of the menstrual cycle?
    Oestrogen levels high in the blood that causes LH to be released from the pituitary gland bursting the Graafian follicle and releasing the Ovum
  17. The corpus luteum secretes ______?
  18. What is progesterone's function?
    • Inhibition of FSH
    • Stimulates blood vessel growth in endometrium
  19. How does the menstrual cycle restart?
    Less and less progesterone is released from the corpus luteum as it degenerates and once there is little left FSH levels begin to rise again restarting the cycle and stimulating another follicle to develop
  20. What is menstruation?
    The fall in progesterone and oestrogen causes the outer layer of endometrium to be shed
  21. Differences between the menstrual and oestrus cycle?
    • Oestrous cycle, the endometrium is reabsorbed if a pregnancy doesn't occur
    • Ovulation is called the oestrus in the oestrous cycle
    • Oestrous cycles usually continue until death
  22. Spermatogenesis is?
    The formation of sperm in the seminiferous tubules
  23. What is oogenesis?
    Formation of Ova (Ovum)
  24. What are the three stages of gametogenesis?
    • Multiplication, cells under go mitotic divisons
    • Growth phase, cells produced grow in size (double DNA)
    • Maturation, cells divide by meiosis and form haploid cells that differentiate into gametes
  25. What's the difference between spermatogenesis and oogenesis?
    • The mitotic divisions (multiplication phase) in females occurs before they are born but the meiotic divisions (maturation phase) do not finish until after fertilisation. 
    • In spermatogenesis no cells become polar bodies and all differentiate into gametes
  26. The outer layer of the seminiferous tubule is made up of ______ _______? What is it's function?
    Germinal epithelium, This is where cells divide in the multiplication phase and as they divide they move towards the centre of the tubule.
  27. The multiplying sperm cells are called _______ ? and when growth stage occurs they develop into ________ ?
    • Spermatogonia
    • Into Spermatocytes
  28. After the spermatocytes divides by meiosis for the first time they are known as?
    Secondary spermatocytes
  29. The haploid cells formed after meiosis in spermatogenesis are called?
  30. Spermatids embed themselves in the _____ _____ that provide nutrients and protect them from the immune system.
    Sertoli cells
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Chapter 1 - IVF babies for those who cannot conceive naturally
2015-02-11 11:01:18

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