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Nervous system review
Review Questions
13
Anatomy
Undergraduate 1
07/19/2007

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Term
what is the overall function of the meninges?
Definition
protection of the central nervous system
Term
what are the meninges comprised of?
Definition
dura mater
arachnoid
pia meter
Term
what do the meninges enclose?
Definition
the brain and the spinal cord
Term
list the layers of the meninges from superficial to deep
Definition
dura mater, arachnoid mater and pia mater
Term
what is gray matter?
Definition
a type of nervous tissue with little myelin
it comtains the somas, dendrites and priximal parts of the axons of neurons
it is the site of synaptic contact between neurons and therfore the site of all synaptic integration(information processing) in the CNS
Term
what is white matter?
Definition
nervous tissue that makes up the spinal cord; contains abudance of myelinated axons,w hich give it a bright, pearly white appearance
communication between levels of CNS
Term
what are the bundles of axons that the white matter of the spinal cord is composed of?
Definition
tracts: they carry signals from one part of the central nervous system to another
Term
describe the appearance of gray matter in a spinal cord cross section
Definition
H shaped in cross sections
butterfly shaped
Term
what are proprioceptors?
Definition
sense organs that monitor the position and movements of body parts
Term
explain the path of a reflex arch
Definition
somatic receptors in the skin-a muscle or a tendon
afferent nerve fibers:which carry information from these receptors into the dorsal horn of the spinal cord
interneurons-which integrate information; these are lacking from some reflex arcs
efferent nerve fibers-which carry motor impoulses to the skeletal muscles
skeletal muscles: somatic effectors that carry out the response
Term
what are basil nuclei?
Definition
masses of cerebral gray matter buried deep in the white matter-lateral to the thalamus
Term
what does the cerebellum do?
Definition
it is responsible for equilibrium, motor coordination, and memory of learned motor skills
Term
what is the arrangement of the cerebral cortex?
Definition
has four lobes: frontal, parietal, temporal, and occipital(all gray matter)
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