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Central Nervous System
N/A
25
Anatomy
12th Grade
11/07/2013

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Term
Central nervous system
Definition
Consists of the brain and spinal cord.
Term
Peripheral nervous system
Definition
Consists of the nerves of the body.
Term
Neuron
Definition
Nerve cell specially constructed to carry out its function.
Term
Fibers
Definition
Paths along which nerve impulses travel.
Term
Myelin sheath
Definition
Covering speeds up nerve impulses as it travels along the axon.
Term
Neuroglia
Definition
The type of cells that insulate, support, and protect the neurons.
Term
Sensory neurons
Definition
Carry messages or impulses toward the spinal cord and brain.
Term
Motor neurons
Definition
Carry messages from the brain and spinal cord to the muscles and glands.
Term
Associative neurons
Definition
Which
Term
Membrane excitability
Definition
A process that creates electric charges.
Term
Synapse
Definition
Where the messages go from one cell to the next cell.
Term
Synaptic cleft
Definition
The space between an axon of one cell and the dendrite of another.
Term
Meninges
Definition
Membranous coverings.
Term
Cerebral cortex
Definition
The outer cortex.
Term
Dura mater
Definition
The outer brain covering.
Term
Arachnoid
Definition
The middle layer.
Term
Pia mater
Definition
Covers the brain surface itself.
Term
Cerebrospinal fluid
Definition
A substance that forms the four ventricles from the blood vessesls of the choroid plexuses.
Term
Lumbar puncture
Definition
Used to remove cerebrospinal fluid.
Term
Cerebrum
Definition
The largest part of the brain.
Term
Frontal lobe
Definition
forms the anterior portion of each hemisphere.
Term
Parietal lobe
Definition
Located behind the frontal lobe.
Term
Epilepsy
Definition
A seizure disorder of the brain.
Term
Encephalitis
Definition
An inflammation of the brain.
Term
Hydrocephalus
Definition
A condition that involves an increased volume of cerebrospinal fluid within the ventricles of the brain.
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