Researchers collected blood samples immediately before and after blood flowed through four organs in a rabbit. Each organ received the same volume of blood per minute.
| Organ | Hormone concentration before the organ in ng dm⁻³ | Hormone concentration after the organ in ng dm⁻³ |
|---|---|---|
| A | 12 | 7 |
| B | 6 | 3 |
| C | 4 | 1 |
| D | 8 | 7 |
Which organ removes the most hormone from the blood per minute?
organ B
organ A
organ D
organ C
89 exam-style questions on Edexcel GCSE Biology 7.1 Hormones and coordination, covering 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback. Each one has a worked solution and a mark scheme showing where the marks go.