Reflex actions are _____ actions.

Spinal cord controls ________ action.

_______ connect the sense organs to the brain.

An electrochemical wave that moves through the nerves are called _____

 A neuron has a main cell called _______.

________ is a very complex system in the human body.

_______ is the basic building block of the nervous system.

Central nervous system consists of _____ and ________.

Specialised extensions of nerve cells are called ______.

 ________ are the short thin extensions which carry information towards the cell body and axon.