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Sasser Nervous

Life Sceince

TermDefinition
Central Nervous System brain and spinal cord
Peripheral Nervous System all the parts of the nervous system except for the brain and spinal cord
Neuron a nerve cell that is specialized and conduct electrical impulses
Impulses electrical messages
axon the long extension of a neuron that carries nerve impulses away from the body of the cell
axon terminal the hair -like ends of the axon
cell body contains the nucleus known as the soma
dendrites branching structure of a neuron that receives messages
myelin sheath fatty substance that srrounds and protects some nerve fibers
Node of Ranvier one of the many gaps in the myelin sheath; where action potential occurs
nucleus organelle in the cell body that contains genetic material
Schwann's cells cells that produce myelin
Somatic nervous system under YOUR control
Autonomic Nervous System you don't control or think about it Example: digestion and heart rate
brain the organ that is the main control center of the nervous system
involuntary automatically happens
voluntary you move
cerebrum largest part of the brain; where you think and most memories are stored; sense touch, light, sound, odors, taste, pain, heat, and cold
left hemisphere part of the cerebrum that controls the right side of the body; writing, solving problems, speaking, reading
right hemisphere part of the cerebrum that controls the left side of the body; music, spatial thinking, interpreting emotions
cerebellum processes sensory information from your body; keeping your balance and shifting weight
medulla connects to the spinal cord; controls involuntary processes; blood pressure, body temperature, heart rate, and involuntary breathing
Created by: bsasser