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69 Cards in this Set

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Neuron
Cell that carries impulses
Dendrite
Carries information toward the cell body
Cell Body
Hold the nucleus & Organells
Axom
Carries information away from the cell body
Nissle bodies
Ribosomes, give grey matter its grey apperence.
Myelin
Insulates the Axon & Speeds transmition.
Axon Terminals
Relese neurotransmiter
Neurotransmitter
Chemicals that travel across the synapes
Synapse
Space between the neurons
Neuroglial Cells
Supporting Cells
Astrocyte
Supply Nutrition
Schwann Cells
Produce mylin in the PNS
Oligodendrocytes
Produce mylin in the CNS
Ependymal Cells
Line enternal cavities, also produce cerebral spinal fluid.
Microglial Cells
Clean up debris
CNS
Brain and Spinal Cord
PNS
Branching nerves PNS

Branch into-

Sensory
Motor
Sensory
Carries impulses toward the CNS
Motor
Carries information away from the CNS

Divides Into-
Somatic
Autonomic
Somatic
Regulates volunatry movement
Autonomic
Regulate involuntary movement

Branches Into-
Sympathetic
Parasympathetic
Sympathetic
EX- Stimulates the adrenal gland
Parasympathetic
Returns you to normal
Cervical Enlargements
Servers the Arms
Lumbar Enlargements
Servers the Legs
Spinal Nerves
Designated by a letter and mumber, EX- C2: 2nd Cervical Nerve
Narrowing
Loses mass as the nerves branch, because of branching nerves
Conus Medularis
Cone shapped end of the spinal cord
Cauda Equina
Nerves that extend from the conus medularis
Filum Terminale
Fianl ligament that attatches to the tail bone
Grey Matter
Contains cell bodies on the inside
White Matter
Contains axons on the outside
Ganglion
Collection of sensory cell bodies outside of the CNS
Cerebrospinal Fluid
Found in the central canal & subarachnoid space, Acts as a "shock absorber"
Cerebrum
For intellegence, Thought and Memory
Cerebellum
For cordination and balance
Brain Stem
Includes the;

Diencephalon
Mesasephalon
Pons
Medual Oblongada
Diencephalon
Divides:
Thalamus
Hypothalamus
Thalamus
Relay center for sensory information
Hypothalamus
Controls emotions
Pons
Relay center for vouluntary and involuntary movement
Midbrain
Interprets visual and auditory information
Medulla Oblongata
Controls vital processes

EX: Breathing, Heart Rate, Pulse
Grey Matter
Cellbodies, outside
White Matter
Axons, Inside
Gyri
Elevation on the brain
Sulci
Depression on the brain
Meninges
Membranes that surround the brain and spinal cord
Pia Matter
Intermost Layer/Membrane that is in contact with the brain and spinal cord
Subarachnoid Space
Contains ceribral spinal fluid, and is the site of a spinal tap
Arachnoid Space
2nd Layer, Web-like, very thin
Dura Matter
Outer moust layer, very durable
Epidural Space
Contains fat, site of anestisia
Innate
Born with it, EX- Rooting reflex
Acquired
Learned reflexes
Monosynaptic
Only 1 synapse, Very Fast
Polysynaptic
2 or more synapse, Slower
Spinal
Processed by the spinal cord only
Cranial
Processed by the brain only
Somatic
Cause a response in skeletal or voluntary muscle
Autonomic
Cause a reponse in skeletal or involuntary muscle
Affector
Always a sense organ
Afferent Neuron
Carries information into the CNS
Association neuron
Is found withen the CNS
Efferent Neuron
Carries information away from the CNS
Efferctor
Is always a gland or a muscle
Sensory
Carries information into the CNS
Motor
Carries information out of the CNS
Mixed
Carries info both ways