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The Nervous System
terms
20
Anatomy
Undergraduate 1
04/11/2008

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Term

Acetylcholine

ACh 

Definition
A chemical neurotransmitter produced at the branching ends of the presynaptic axon; transmits impules to the postsynaptic neuron or effector
Term

action potential 

Definition
the change in electical potential across the neuron membrane during transmission of the nerve impulses
Term

Autonomic Nervous System

Definition

AUTOMATIC 

the division of the peripheral nervous system that supplies nerves the smooth (involuntary) muscles of internal organs, heart and to glands.

Term

Axon 

Definition
carries impulses away from the cell body
Term
The brain stem is part of the brain and includes..
Definition
the midbrain, medulla, and the pons
Term
Cell body
Definition
The portion of a neuron containing its nucleus
Term

Central Nervous System

CNS 

 

is composed of  

Definition
the brain and spinal cord
Term
Cerebellum
Definition
part of the brain concerned with muscular coordination and tone
Term
Cerebral cortex
Definition
The outer (gray matter) layer of the cerebrum
Term
Divides the cerebrum into 2 hemispheres
Definition
 longitudinal fissure
Term

What is Cerebrospinal fluid?

(CSF) 

Definition
the fluid surrrounding the nervous tissue of the brain and spinal cord and filling the brain's ventricles
Term
Cerebrum
Definition
A major part of the brain-concious sensation, voluntary activity and cognitive thought.
Term
How many pairs of cranial nerves are there?
Definition
12
Term
Dendrite
Definition
transmits impulses towards the cell body
Term
Diencephalon
Definition
includes the thalmus and hypothamlus
Term

Ganglion

plural: ganglia 

Definition
A cluster of nerve cell bodies outside the CNS
Term
Gray matter
Definition

contains mostly cell bodies

 (not mylinated)

Term
Interneuron
Definition
acts as the connecting link between sensory and motor neurons in a nervous pathway.  ALL interneurons lie within the CNS
Term
Meninges
Definition
The three  membranes enclosing the CNS
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