OCR thyroid homeostasis worksheet, 9-1 21st century science GCSE biology

Worksheet on homeostasis and thyroid function, covering thyroxine, TSH and homeostasis and negative feedback generally. This two-page worksheet has plenty of illustrations and diagrams to help students remember the topic and case-study questions. There’s an in-depth mark scheme and versions for colour and black and white printing. Targets the OCR twenty-first Century Science 9-1 GCSE Biology course. I also have versions for AQA GCSE biology and Edexcel GCSE biology.