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Hormones as chemical messengers

Hormones as chemical messengers

Labelled human endocrine system showing pituitary, thyroid, adrenal glands, testes and ovaries with hormones in blood and target cell receptors

The endocrine system coordinates organs using hormones carried in the blood. The nervous system uses electrical impulses for fast, short-lived responses, while endocrine responses are usually slower but longer-lasting.

Coordination and control – the endocrine system Lesson

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

Step-by-step lessons covering OCR GCSE Biology Coordination and control – the endocrine system for Foundation and Higher tier. Each lesson works through exam-style questions in the written papers format. Start with the foundational topics and build up to the higher-tier material.

Lessons