Menstrual Cycle
1. (a) Give
the full name of the female hormone below:
i. FSH
ii. LH
iii. GnRH
(b) Which one of these hormones is is
secreted by the hypothalamus?
(c) What is its target organ?
2. The diagram below shows the development
of a follicle during the menstrual cycle.
Place the letter to the diagrams above that corresponds to the following descriptions.
(a) Has
recently been affected by LH
(b) Is
affected by FSH
(c) Is
degenerating
(d) Is
filled with fluid
(e) Secretes
most oestrogen
(f)
Secretes
most progesterone
3. These
graphs show typical hormonal changes for a woman in her late 20s.
(a) Oestrogen has different effects depending
on its concentration.
(i) Put a S on the graph whenever oestrogen stimulates LH secretion.
(ii) Put an I at a point where oestrogen inhibits LH secretion.
(b) FSH
causes new follicles to develop.
Put a F whenever FSH is acting on a new
follicle.
(c) Menstruation
begins when the progesterone level falls.
Put a M whenever menstruation begins.
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