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Nervous System Tayelar Moscal Period 5 - Coggle Diagram
Nervous System
Tayelar Moscal
Period 5
Major divisions and subdivisions of the nervous system
Neurotransmitters
Over 100
May have
Amino Acids,
acetylcholine,
Actions depend on receptors
Some neurons make one type; others make 2-3
Acetylcholine
Norepinephrine
:
Dopamine
: (CNS) positive feelings / (PNS) depending on receptors it may excite or slow down
Serotonin
: (CNS) primarily used for slowing down/relaxing; stopped by LSD; supplemented by selective serotonin reuptake inhibitor drugs (SSRIs)
Histamine
: (CNS) stimulates alertness in Hypothalamus
Major Functions of the Nervous System
Sensory Function
Integration Function
Motor Function
Action potential & the Nerve Impulse
Spinal nerves
31 pairs
ALL except first pair are mixed CH 9F
Major parts and functions of the spinal cord
Connective Tissue Coverings
Perineurium
= cover fascicle of nerve fibers
Endoneurium
= covers individual axons
Epineurium
= outer cover
Major parts and functions of the brain
Tissues
Disorders associated with Nervous System CH 9E
Compare & contrast the autonomic nervous system
Reflex arc
Cranial nerves
12 pairs in order of superior --> inferior
Most are mixed nerves some sensory / some motor
Classification of neurons
Functional Classification
Interneurons (
Association / Internuncial
)
Form links to other neurons inside of the central nervous system
Gather in specialized clumps = nuclei
Motor Neurons (
Efferent
)
Multipolar
Sends impulses from CNS --> Peripheral Receptors
Sensory Neurons (
Afferent
)
Sends impulses from Peripheral receptors --> CNS
May be unipolar; some bipolar
Structural Classification
Unipolar
Sensory Neurons
have one process out of cell body; it splits into 2, is used as 1
Axon
Peripheral Process
has dendrites;
Central Process
goes to
Central Nervous System
Found in
Ganglia
Multipolar
One
Axon
and many
Dendrites
Are
Interneurons
and
Motor Neurons
Bipolar
Has 2 processes (
Axon
and
Dendrite
Found in spaces like eyes, ears, and nose