the nerve cell

• nerve cell is the basic unit of the nervous system they are also called neurons
• there are billions of neurons in the body
• 12 to 14 billion of neurons is in one part of the brain
• neuron contains a body cell
• a body cell contains the nucleus
• cell body has root like structures which are dendrites and axons
• dendrites carry impulses towards the cell body
• a cell may have as many 200 dendrites
• axons carry impulses away from the body
• neurons have the ability to carry signals or impulses
• a nerve impulse is a combination of an electrical charge in a chemical reaction
• a nerve impulse is an electrochemical signal moving along a neuron
• synapse is the space between neurons
• stimulus is any factor in the environment that influences behavior
• the plural form of stimulus is stimuli
• response is a reaction to a condition or stimulus
• it is true that an organism must be able to respond to a stimulus in order to survive
• reaction time is the length of time between application of a stimulus and detection of a response