Menstruation

Question 1

2 cycles in mestruation name and explain

Answer 1

Ovarian cycle which is the development of the follicle, ovulation and formation of corpus luteum

uterine cycle which controls the preparation of the endometrium in the uterus for pregnancy

Question 2

Ovarian cycle consists of 3 phases name and explain

Answer 2

Follicular phase - development of Grafiaan follicle (day 1 - 14)

ovulation - release of oocyte (day 14)

Luteal phase - development of corpus luteum (from day 15)

Question 3

development of graafian cycle

Answer 3

oogenesis occurs and ovum is covered in graafian follicle, every cycle develops one graafian follicle, follicle fluid will continue increasing until it bursts the follicle and wall of ovary releasing egg into fallopian tube.

Question 4

ovulation phase

Answer 4

egg bursts into infundibulum, process called ovulation.

grafian follicle stimulates hypophysis which secretes LH which stimulated ovulation

Question 5

luteal phase

Answer 5

after ovulation graafian follicle develops yellow cell called corpus luteum. corpus luteum secretes progesterone and oestrogen, this allows implantation to occur, if implantation is unsuccesfull corpus luteum disintegrates

Question 6

uterine cycle consists of 3 phases

Answer 6

menstruation - shedding of lining
proliferative - preparing for fertilization
secretory - preparing for implantation

Question 7

Menstruation (1-7 days)

Answer 7

no fertilization causes endometrium to breakdown and discard itself and unfertilized ovum

Question 8

proliferative phase (up to 5 days)

Answer 8

endometrium prepares for possible fertilization, upper walls of endometrium thicken. oestrogen causes this thickening and causes cervix to release mucus to make sperm mobility to reach ovum easier

Question 9

secretory phase