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3.2 Coordination and control – the endocrine system

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Question 5
F

The Figure shows how the concentrations of two hormones in the blood change during one menstrual cycle.

Figure

image

a.

Give the day on which the concentration of oestrogen is highest.

[1]
b.

Describe how the concentration of progesterone changes from day 14 to day 28.

Use data from the Figure in your answer.

[2]
c.

Explain why menstruation begins after the concentration of progesterone falls.

[2]
Markscheme

3.2 Coordination and control – the endocrine system Questions

  1. GCSE
  2. /Biology
  3. /3.2 Coordination and control – the endocrine system

84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.

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