A surgeon can remove damaged tissue, but the boundary between damaged and healthy brain tissue is uncertain. Which reason best explains why treatment is difficult?
Brain regions are delicate and interconnected, so removing healthy tissue may impair another function.
Brain regions are hard and independent, so removing damaged tissue cannot change another function.
Brain regions contain no blood vessels, so damaged tissue cannot be identified using any scanning method.
Brain regions contain no neurones, so damaged tissue cannot communicate with any other body organ.
40 exam-style questions on AQA GCSE Biology 5.2 The human nervous system, covering 5.2.1 Structure and function, 5.2.2 The brain, 5.2.3 The eye, and 5.2.4 Control of body temperature. Each one has a worked solution and a mark scheme showing where the marks go.