The myelin sheath is important to the nervous system because:

The synapse in the nervous system is:

This is the gap between myelin along axons and dendrites that depolarize with an action potential:

The nervous system is divided into two divisions called:

The PNS is divided into to:

The neuron consists of:

In the PNS, myelin sheath is made of:

In the CNS the myelin sheath is made of:

The function of the neurolemma is:

These are chemicals released at the synapse that enable nerve impulses to cross:

The neurolemma is formed by what parts of the schwann cell?

These neurons  transmit impulses towards the CNS:

These neurons transmit impulses away from CNS towards effectors:

Approximately how many neurons does the human body have?

The axon of the neuron is responsible for: