nervous System Flashcards
brain
organ of soft nervous tissue
spinal cord
cylindrical bundle of nerve fibers
Cranial nerves
twelve pairs of nerves which arise directly from the brain
Autonomic nervous system
controls muscles of internal organs
Peripheral nervous system
outside of the brain and spinal cord
Dura mater
tough outermost membrane enveloping the brain and spinal cord
Pia mater
tender matter
Arachnoid mater
middle layer of your meninges
Broca’s area
region of brain concerned with speech
Medulla
inner region of a organ or tissue
Cerebellum
back of the skull in vertabraes
Pons
links the medulla oblongata and the thalamus
Midbrain
located below the cerebral cortex and at the topmost part of the brainstrem
Cerebrospinal fluid
clear watery fluid fills the space between arachnoid membrane and the pia mater
Blood-brain barrier
helps keep harmful substances from the brain
Hypothalamus
controls body temperature, hunger and thirst
Diencephalon
central portion of the brain
Stroke
blocks blood supply to the brain
Brainstem
connects the cerebrum to the spinal cord and cerebellum
Cerebral cortex
outermost layer
Limbic system
involved with our behavior and emotion repsonses
Phineas Gage
large rod through his brain and stayed awake the whole time
Acetylcholine
a compound that occurs throughout the nervous system
Dopamine
compound present in the body
GABA
cemical messenger in your brain
Glutamate
salt or ester of glutamic acid
Norepinephrine
another term for noradrenaline
Serotonin
monoamine neurotransmitter
Central nervous system
made up of brain and spinal cord
Somatic nervous system
use of skeletal muscles
Neuroglia
any of the cells that hold nerve cells in place and help them work the way they should
Astrocytes
star shaped glial cell of the central nervous system
Microglia
resident cells of the brain
Ependymal cells
ciliated- epithelial glial cells that develop
Oligodendrocytes
myenlinating cells of the central nervous system
Schwann cells
helps seperate and insulate nerve cells
Satellite cells
precursors to the skeletel muscle cells and are responsible for the ability of muscle tissue to regenerate
Dendrites
short branch extension of a nerve cell
Axon hillock
region where the plasma membrane generates nerve impulses
Axon terminal
very end of the axon
Myelin
an insulating layer
Nodes of Ranvier
specialized regions in the axonal membrane that are insulted by meylin
Depolarization
loss of polarization