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Mr. Sherden's class

Sensation

collects information about internal and external environment(sensory)

Interpretation

processing information and making decisions

Response

directing muscles and glands to act(motor)

Central Nervous System

brain and spinal cord

Peripheral Nervous System

cranial and spinal nerves

Somatic Nervous System

conscious control/awareness

somat/o

body

Neurons

conduct electricity(excitable)

Glial Cells

not excitable. Support, protect or insulate neurons

neur/o

nerve

gli/o

glue

Neuron Parts

dendrites
cell body
axon

dendr/o

tree

Dendrites

receive action potentials(electric impulses)

Cell Body

generates action potentials

Axon

carries action potential away from cell body

Action Potential

electrical impulses

Synapses

-junctions between consecutive neurons
-axon terminals contain vesicles of neurotransmitter(specialized chemicals)
-neurotransmitter binds to receptor sites on dendrite(post-synaptic membrane), opening sodium gates and causing depolarization of neuron

Autonomic Nervous System

not under conscious control or awareness

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