Oogenesis and spermatogenesis

Question 1

when does oogenesis begin?

Answer 1

in utero

Question 2

what is the earliest recognisable female germ cell?

Answer 2

primordial germ cell

Question 3

what are the 2 female germ cells?

Answer 3

primordial germ cell

oogonia

Question 4

what cells enter meiosis?

Answer 4

oocytes

Question 5

what is the first polar body?

Answer 5

one of the 2 products in the first meiotic division

Question 6

presence of 2 polar bodies= what?

Answer 6

sperm entry and completion of second meiotic division

Question 7

what phase is this?

first half
maturation of egg, ready for ovulation mid cycle

Answer 7

follicular phase

Question 8

what phase is this?

second half
development of corpus luteum

induces preparation of tract for pregancy

Answer 8

luteal phase

Question 9

FSH and LH come from where?

Answer 9

anterior pituitary

Question 10

what does FSH do?

Answer 10

stimulate follicle development (acts on ovary)

Question 11

what does LH do?

Answer 11

acts on ovary

stimulates follicle maturation, ovulation and development of corpus luteum

Question 12

when the corpus luteum degenerate what does it form?

Answer 12

corpus albicans

Question 13

at what time (approx) does the placenta take over the role of corpus luteum ?

Answer 13

week 6

Question 14

in males what 2 hormones stimulate spermatogenesis?

Answer 14

FHS and testosterone

Question 15

testosterone comes from what cells?

Answer 15

interstitial cells

Question 16

what acts on the interstitial cells to cause testosterone secretion/

Answer 16

LH

Question 17

what does Inhibin do ?

male

Answer 17

decrease FSH secretion

Question 18

too much testosterone does what?

Answer 18

decrease release of GnRH and LH

Question 19

what do the sertoli cells in the seminiferous tubules secrete?

Answer 19

androgen binding globulin and inhibin