Question

How is nervous tissue adapted to its functi?

Answer 1

The sheath acts as an insulator - rather like the plastic coating of an electrical wire. Neurones are adapted to their function by being long, so that they communicate with distant parts of the body. They also have branched endings called dendrites.

Answer 2

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they have a long fibre (axon ) so they can carry messages up and down the body over long distances.

in a stimulated neuron, an electrical nerve impulse passes along the axon.

the axon is insulated by a fatty (myelin) sheath - the fatty sheath increases the speed of the nerve impulses along the neuron.