The motor neurone controls the contraction of muscle cellls.
- Cell body containing nucleus and other organelles
- Dendrites radiate from the cell body to communicate with other neurones
- A long axon, full of many mitochondria, leads out of the cell body
- The axon is insulated by the myelin sheath
- Myelin sheath consists of a membrane of a Schwann cell, which wraps around a layer of fat surrounding the axon, insulating the axon.
- At intervals there are gaps in the sheath, where impuses are regenerated, which are called nodes of Ranvier
- The axon ends in a number of dendrites which contact muscle tissue with motor end plates
Sensory neurones are similar to motor neurones, with a few differences:
- The neurones transmit messages to the Central Nervoud System
- Each neurone has a receptor, reacting to a certain stimulus (e.g. Temperature)
- The receptor reacts to local change by generating a nervous impulse
- When a stimulus illicits an impulse being created, it is known as a transduction
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