The image shows a representation of a neurone.
Identify structures X-Z in the image.
Branching from structure X of the neurone in part a) are structures known as dendrites.
State the role of dendrites in the nervous system.
Describe the structure of Y from the image in part a).
It has been estimated that a neurone without structure Y present can conduct nerve impulses at speeds of 0.5 m s-1 whereas a neurone with structure Y present can conduct impulses at speeds of 150 m s-1.
Calculate how many times faster impulse conduction is in the presence of structure Y than without structure Y.
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