A proposed treatment replaces neurones lost after a spinal injury. The replacement cells survive but the patient still cannot move the affected limb.
Which explanation is most likely?
the cells have not replaced the muscle fibres in the affected limb
the cells have not formed the correct connections with other neurones
the cells have not changed electrical impulses into signals in the blood
the cells have not become sensory receptors on the surface of the skin
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.