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Hormones as blood-borne signals

Hormones as blood-borne signals

Hormones are chemical messengers secreted by endocrine glands into the blood, so they can coordinate organs that are far apart. Endocrine signalling is usually slower than nervous communication, but its effects often last longer.

Hormonal communication Lesson

  1. A Level
  2. /Biology
  3. /Hormonal communication

Step-by-step lessons on OCR A A Level Biology Hormonal communication. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons