Menstrual Cycle

Question 1

Describe secondary sex characteristics

Answer 1

Maturation of ovaries uterine tubes ad uterus
Growth of armpit and pubic hair
Widening of pelvis
Development of breast
Increased fat tissue

Question 2

Stages of menstrual cycle

Answer 2

Menstrual
Proliferative
Secretory

Question 3

Menstrual stage

Answer 3

When ovum not fertilised the corpus lute I’m degenerates
Progesterone and oestrogen fall and function layer f endometrium sheds
Means the hypothalamus and anterior pituitary gland ca resume their cyclical activity and evens of FSH RISE

Question 4

Proliferative

Answer 4

One or more ovarian follicles are maturing stimulated by FSH
They are producing oestrogen which stimulates proliferation of the functional layer of the endometrium
It thickens becoming very vascular and rich in mucus secretory glands.
Rising levels of oestrogen trigger a surge of LH which triggers ovulation
Usually one follicle ruptures and releases its ovum which is now called secondary oocyte

Question 5

Secretory

Answer 5

After ovulation LH stimulates development f corpus luteum which produces progesterone oestrogen and inhibit.
Secretory gland produce watery like mucus which helps spermatozoa through to the uterus to the uterine tubes.
After ovulation progesterone and oestrogen and inhibin suppress the hypothalamus and anterior pituitary so FSH and LH levels fall
If the ovum is not fertilised the falling levels of LH lead to the degeration and the death of corpus Lutyens which is dependant on LH for survival
If it’s fertilised the fertile we ovum travel to uterus where it becomes embedded in the wall and produces hCG which keeps the corpus lutetium intact enabling it to keep secreting progesterone and oestrogen.

Question 6

Puberty in females

Answer 6

Hypathalus releaseLHRH
Acts on anterior pituitary gland causing it t release FSH and LH
FSH and LH causes ovaries to secret oestrogen

Question 7

Naegeles rule

Answer 7

Add 7 days
Subtract 3 months
Change year