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3.2 Coordination and control – the endocrine system

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Question 9

Hormones are commonly used in biochemical methods of contraception.

a.

Which two female reproductive hormones are typically found in the combined contraceptive patch?

Choose the two correct answers from the list below:

  • FSH\text{FSH}FSH
  • Insulin\text{Insulin}Insulin
  • Estrogen\text{Estrogen}Estrogen
  • Progesterone\text{Progesterone}Progesterone
  • LH\text{LH}LH
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b.

How do these two hormones act together to prevent pregnancy?

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c.

Hormonal contraceptives can be administered in private or clinical settings. Compare these two options:

  • Method 1 (Contraceptive Patch): A small adhesive patch is applied to the skin once a week for 3 weeks, followed by a 7-day patch-free interval. Fewer than 1 in 100 women will get pregnant in a year with perfect use. However, typically about 7 in 100 women will get pregnant in a year.
  • Method 2 (Intrauterine System - IUS): A small T-shaped plastic device is inserted into the womb by a trained healthcare professional, where it releases hormones continuously. It remains effective for 5 years. Fewer than 1 in 100 women using this system get pregnant in a year.

Which method is more successful in typical, everyday use? Evaluate the information provided to explain why.

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Markscheme

3.2 Coordination and control – the endocrine system Questions

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

23 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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