Cambridge IGCSE Biology practice

Paper 3 structured question: Sex hormones in humans

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Topic

Sex hormones in humans

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Paper 3Theory (Core)3 marks

The menstrual cycle involves changes in the ovaries and the uterine lining to prepare the body for pregnancy.

Diagram Description

A diagram shows the phases of the menstrual cycle with changes in the ovary and uterine lining over 28 days.

Day	Ovary	Uterine Lining
1-5	Menstruation: follicle begins to develop	Menstrual bleeding: lining breaks down
6-14	Follicle matures	Lining thickens
14	Ovulation: egg released	Lining thick and ready
15-28	Corpus luteum forms	Lining maintained or breaks down if no fertilization

a
Describe Describe the changes that occur in the ovaries during the menstrual cycle.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)3 marks

Description

The uterine lining thickens after menstruation and is shed if fertilization does not occur.

a
Describe Describe the changes in the uterine lining during the menstrual cycle.
Your answer
Aim for approximately 3 distinct marking points.
[3]