1. Neuron – transmit electrical impulses from one site and receive and process information
-The electrical signals travel from the brain to muscles and skin. Organs and muscles
-billions of cells send and recv signals to tell it what to do
-basic fundamental unit of brain and NS
-specialized conductor cell
-rcv and transmit electrochemical impulses
-responsible for receiving sensory input from external world
-sending motor commands, one of our effector
-and

2. Supporting cells (neuroglia) – are non – conducting cells that are intimate physical contact with neurons
-cells that help support neuron to enable them
-diverse in terms of type or class
-provide biological, developmental, physiological and metabolic support for neurons
-responsible for maintaining homeostatic control and immune surveillance in our NS