A child has an inherited condition that changes the shape of receptor molecules on the membranes of muscles that close the hand. The motor neurones supplying these muscles release neurotransmitter normally.
Explain why this condition makes it difficult for the child to grip an object.
111 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.