1. The part on the left of the diagram (the cell body), would be embedded in our spine and on the other end it would be connected to an effector, and in this case, the muscle fibres. The electrical impulse or the nerve impulse is carried inside the walls from the cell body to the synaptic knot where it connects to the muscles through the axon which can be as long as one meter and only one cell wide. In Mammals the axon would be surrounded by another type of cell known as the Schwann cell and these contain a great deal of fat and these form the myelin sheath. The effect of having a myelin sheet is that it increases the speed of nerveconduction and this is one way of connecting the coordinator to the effector.
Diagram of the Motor nerve:
Difference between Nerves and Hormones:
- Nerve impulses are fast, Hormones normally take longer.
- Nerve impulses re sent through neurons whereas hormones are sent through blood.
- Nerve impulses enables body to response to external environment and the hormones enable body to respond to internal environment