9b Biology, Mr. Blaurock
1.2 The neuron
Neurons are the cells of the nervous system. They have a very specific form, which supports their function of transmitting the electric nerve impulses.
The largest segment of the neuron, the _____________________, can reach a length of up to 1 meter, with a constant diameter of only 0,01 – 0,02 millimeters. The signal transmission through a neuron can only run one way, from the tree-like _____________________ to the bulbous
_____________________. The ______________________ consists of other specialized cells, the so- called Schwann-cells, which are lined up like pearls on a necklace and help speed up the signal transmission through the _____________________.