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27 Cards in this Set

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What are the #2 divisons of the nervous system
1) central nervous system
2) peripheral nervous system
central nervous system
division located within the skull & spine
peripheral nervous system
division of nervous system that is located outside the skull & spine
#2 divisions of PNS
1) somatic Nervous system
2) autonomic nervous system
part of the PNS that interacts with external environment;(composed of afferent & efferent nerves
afferent nerves
carry sensory signals from the skin, skeletal muscles, joints, eyes, ears, & etc... to CNS
efferent nerves
carry motor signals from CNS to skeletal muscles
part of the PNS that regulates the body's internal environment.
# 2 kinds of efferent nerves in ANS
1)sympahetic nerves
2) parasympathetic nerves
sympathetic nerves
those nerves that project from CNS in the lumbar & thoracic regions of spinal cord
parasympathetic nerves
project from the brain & sacral region of the spinal cord
#3 conventional views of functions of sympathetic systems
1) stimulate, organize, & mobilize energy resources in threatning situations
2) each autonomic target organ receives opposing parasympathetic input
3) sympathetic /\'s are indicative of psychological arousal
#3 conventional views of functions of parasympathetic systems
1) nerves act to conserve energy
2)target organ recieves opposing sympathetic input
3) /\'s are indicative of psychological relaxation
#3 meninges
1)dura mater
2) arachnoid membrane
3) pia mater
dura mater menige
outer tough membrane
tough mother
arachnoid meninge
next layer membrane inside dura mater
spider web like
pia mater meninge
inner most meninge which adheres to the surface of CNS
pious mother
Cerebral Spinal Fluid
protective fluid that fills the sub arachnoid space, central canal of spinal cord, & cerebral ventricles of brain
central canal
small central channel that runs the length of spinal cord
cerebral ventricles
four large internal chambers of brain
choroid plexus
networks of capillaries that protrude into the ventricles from pia mater lining
blood-brain barrier
mechanism that keeps certain toxic substances in the blood from passing into brain tissue
#4 kinds of glial cells
1) oligodendrocytes
2) Schwann cells
3) Astrocytes
4) microglia
glial cells that myelinate axons of the CNS
Schwann cells
glial cells that compose the myelin sheaths of PNS axons & promote regeneration
large star shaped glial cells that play a role in passage of chemicals from blood into CNS
respond to injury or disease by engulfing cellular debris and triggering inflammatory responses.