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3.2 Coordination and control – the endocrine system

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Question 11

The endocrine control of the menstrual cycle involves follicle-stimulating hormone (FSH) stimulating the growth of ovarian follicles. At an early stage of development, a primary follicle has a diameter of 45×10−3 mm45 \times 10^{-3}\text{ mm}45×10−3 mm. Under the influence of FSH, it develops into a mature Graafian follicle with a diameter of 22 mm22\text{ mm}22 mm just before ovulation.

Calculate the increase in the diameter of the follicle.

Give your answer to 2 decimal places.

[2]
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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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