When do eggs begin to mature in the ovaries?
From puberty.
AQA GCSE Biology - Foundation (8461) · 4.5.3.4
Revise AQA GCSE Biology - Foundation (8461) specification point 4.5.3.4, Hormones in human reproduction, with free active-recall flashcards. Flip through the set or review every question and answer below.
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When do eggs begin to mature in the ovaries?
From puberty.
How many eggs are typically released by ovulation in one menstrual cycle?
One egg.
How long is a typical menstrual cycle?
Around 28 days, although cycle length varies.
Where are FSH and LH released, and where do they act?
They are released by the pituitary gland and act on the ovaries.
What does follicle stimulating hormone (FSH) stimulate in the ovary?
Maturation of an egg in an ovarian follicle.
What does luteinising hormone (LH) stimulate?
Ovulation.
Where is oestrogen, the main female reproductive hormone, produced?
In the ovaries.
What effect does oestrogen have on the uterus lining?
It promotes the build-up of the lining.
What does progesterone do to the uterus lining after ovulation?
It helps maintain the lining.
What happens to hormone levels and the uterus lining if pregnancy does not occur?
Oestrogen and progesterone levels fall, and the lining is shed during menstruation.
What are secondary sexual characteristics?
Physical features associated with sexual maturity that are not the reproductive organs themselves.
What stimulates the development of secondary sexual characteristics during puberty?
Increased production of sex hormones.
Where is testosterone mainly produced?
In the testes.
What are three changes promoted by testosterone during puberty?
Where is oestrogen mainly produced?
In the ovaries.
What are two changes promoted by oestrogen during puberty?
What role do sex hormones play in secondary sexual characteristics once they have developed?
They help maintain those characteristics.