Why can a CT scan help a doctor investigate a suspected brain tumour?
it measures electrical impulses inside the skull without opening the skull
it records neurotransmitter diffusion inside the skull without opening the skull
it removes abnormal tissue inside the skull without opening the skull
it produces images of tissue inside the skull without opening the skull
43 exam-style questions on Edexcel GCSE Biology 2.3 The nervous system and brain, covering 2.3.1 Structures and functions of the brain, 2.3.2 Imaging brain function with scanning, 2.3.3 Limitations in treating nervous system damage, 2.3.4 Neurones and impulse transmission, and 2.3.5 Structure and function of a reflex arc. Each one has a worked solution and a mark scheme showing where the marks go.