nervous system/reflexes

contains the nucleus and organelles of the cell to control the normal function

short and branched extension of the neuron that receives impulses and directs them towards the cell body

thin extension of the neuron that usually conducts impulses away from cell body, can be covered by myelin sheath

fatty insulate layer, formed by Schwann cells, which can surround a dendrite or axon and functions to increase speed of a nerve impulse

gaps between the myelin sheath that forces impulses to travel from node to node

small knobs on the ends of anions that contain neurotransmitter chemicals that are released when nerve impulses arrive there

one axon multiple dendrites most likely to be interneuron

one axon one dendrite eyes/ear/nose

one extension cell. body is to the side usually sensory

a rapid and involuntary response to a stimulus

rapid, involuntary, stereotyped (same neutrons every time, reflex arc)

innate; born knowing how to do learned; become involuntary after lots of practise

• receptor • sensory neuron • interneuron in spinal cord • motor neuron • Effector

electrochemical change that travels along nerve fibre -change in electrical voltage caused by change in concentrations of ions inside and outside of cell membrane of neuron speed is determined by diameter and myelination