Female Reproduction 2

Question 1

What happens during day 0-14 ?

What happens during day 14-28?

Answer 1

Day0-14 ;
Hypothalamus releases GnRH, anterior pituitary releases FSH & LH, ovary releases oestrogen (highest day 14)
Day 14-32;
Switches off GnRH, switches off LH & FSH, progesterone increases (day 20) then decreases, oestrogen decreases, inhibin increases

Question 2

What happens at day 14 during ovulation?

Answer 2

+ feedback, LH surge causes peak oestrogen level - triggers ovulation

Question 3

What is difference between identical and non identical twins ?

Answer 3

Non identical = 2 eggs released and fertilised by separate sperm so have different gene
Identical = 1 egg released and 1 sperm then the zygote divides and each cell goes on to form a body - same genes

Question 4

What are the phases of ovarian cycle and uterine cycle ?

Answer 4

Follicular phase = 1. Menses (shedding of uterine lining) 2. Proliferative (repair and regeneration)
Luteal phase = 3. Secretory phase (glycogen rich mucous- form corpus luteal)

Ovarian = follicular and luteal

Question 5

What are some disorders or endometrium ?

Answer 5

Amenorrhea (no menses)
Dysmenorrhea (painful menstruation)
Endometriosis ( growth of endometrial tissue outside uterus )

Question 6

What do developing follicle release during the FOLLICULAR phrase ?
What do the Corpus Luteum secrete in the LUTEAL phase ?

Answer 6

Developing follicles secrete oestrogen
Corpus luteum secretes progesterone and oestrogen
Corpus albican (day 28) - no sex hormones

Question 7

Why is FSH necessary - F phase ,and why is LH necessary - L phase

Answer 7

FSH - stimulation of follicle

LH - rupturing of follicle during ovulation , into corpus luteum then into corpus albicans

Question 8

What is the dominant follicle during the ovarian cycle ?

Answer 8

Graafian follcile - releases egg

Question 9

What is follicle called when goes from 46 chromosomes to 23 chromosomes

Answer 9

Primary follicle - secondary follicle