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47 Cards in this Set

  • Front
  • Back
What is part of the CNS?
the brain and spinal cord
What is part of the PNS?
nevrves that lie outide CNS
Thin cytoplasmic processes- receive stimuli
dendrites
single elongate process transmits an impluse down its length
axon
at end of axon contains a neurotransmitter
axon knobs
What is part of the CNS?
the brain and spinal cord
What is part of the PNS?
nevrves that lie outide CNS
Thin cytoplasmic processes- receive stimuli
dendrites
single elongate process transmits an impluse down its length
axon
at end of axon contains a neurotransmitter
axon knobs
surrounding a PNS axon are many ______ cells
schwann
fuctions of the myelin sheath are?
1. insulates the axon, preventing impulses from stimulating other axons
2. speeds impulse
3. guides axonal regeneration of peripheral nerves
In CNS cells called ____ form the myelin sheath
oligondendrocytes
a small gap at the junction of each exon knob and another neuron or muscle cell
synapse
CA++ cause the relases of .....
acetylcholine
transmit impulses from sense organs to CNS
sensory neurons
carry impulses from CNS to skeletal muscles
motor neurons
antonomic division 2 sets of nerves that send impulses from CNS to digestive, circulatory, urogenital and endocrine organs
antonomic division
extend from CNS into sympathetic chain ganglia to organs.
sympathetic nerves
what is the result of sympathetic stimulation?
-increases heart rate
-increases respiration rate
-decreases digestive activity
from brain stem and end of spinal cord to organs
parasympathetic nerves
a nerve from brain to heart, lungs, kidney, and digestive organs
vagus nerve
What is the result of parsympathetic stimulation?
-decreases heart rate
-reduces blood pressure
-decreases inrespiration rate
-stimulation at time of rest
axons of sensory and motor neurons
white matter
cell bodies and dendrites of neurons
gray matter
This surrounds the brain externally and internally to cushion the brain
CSF
protective layers that surround the brain
meninges
CSF is produced by ....
blood filtration from capillaries
whats the largest part of the brain?
cerebrum
the outer convoluted region is the .......
cerebral cortex
covultions are the.....
gyri
the furrows are the .....
sulci
Located between the cerebral cortex and thalamus
limbic system
nerve tracts that interconnect right and left cerebral hemispheres
corpus callosum
relay center that lies below corpus callosum
thalamus
controls homeostasis. Hunger and thirst center
hypothalamus
crossing of optic nerves
optic chiasma
relay center for visual and auditory information and head movements
corpora quadrigemina
conrols cerebrum contol of equilibrium, posture and coordinates movement of skeletal muscles
cerebellum
relay center-connects spinal cord with higher brain centers
pons
conrols involunatary activites
medulla oblongata
sensory from nasal cavities to brain
olfactory
sensory from eyes to brain
optic
motor from brain to eye muscles
oculomotor
mixed; sensory from taste buds to brain and motor from brain to jaw muscles.
trigeminal
degeneration of the myelin sheaths around nerves in the CNS
multipole sclerosis
a virus that destroys motor neurons in the spina cord
polio