Name the numbered structures:

1 : Neuron cell body nucleus

2 : Neuron axon hillock

3 : Myelin sheath

4 : Node of Ranvier

If this neuron is in the PNS, what kind of cell makes structure 3 ? Schwann cell

What do we call a collection of axons in the PNS ? A Nerve

If this neuron is part of a larger nerve, what connective tissue wrapping would you find around a nerve ?

Epineurium

What do you call a sub-collection of nerve fibers (axons) within a nerve ? A Fascicle