
I knw this is kinda weird posting project stuff but it's for the good of our bio project XD
Script (clarissa's and zenia's)
motor neurone consist of :
dendron
dendrites of a dendron
cell body
axon
myelin sheath
nearilemma
Node of ranvier
dendrites of an axon
motor end plate
dendron and dendrites of a dendron and cell body and axon
The nerve fibres that transmit nerve impulses towards the cell body are called dendrons. A motor neuron has many dendrons that has end branches called dendtrites, which enter a large, irregular grey cell body at one end. Dendrites are usually short and divided. The cell body is enclosed by a cell (plasma) membrane and has cytoplasm and a central nucleus. A single long axon, leaves at the other end, extending towards the dendrites of the next neuron or to form a motor endplate in a muscle. The motor end plate is a junction between the dendrite and the muscle fibre. Nerve impulses are sent in this direction.
myelin sheath and neurilemma and Node of ranvier and motor end plate
The axon is surrounded by the myelin sheath, which forms a whitish, non-cellular, fatty layer around the axon. It insulates the axon to prevent any loss of impulses. Outside the myelin sheath is a cellular layer called the neurilemma or sheath of Schwann cells. The myelin sheath together with the neurilemma is also known as the medullary sheath. This medullary sheath is interrupted at intervals by the nodes of Ranvier. They allow nerve impulses to jump from node to node, helping to speed up the transmission of impulses along the nerve fibre.