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3726169
Bio 216: Nervous System, Neuron, Sensory Systems
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required chart for BIO 216
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nervous system
biology unit 1
physiology
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dmk121
, updated more than 1 year ago
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Created by
dmk121
almost 9 years ago
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Resource summary
Bio 216: Nervous System, Neuron, Sensory Systems
Nervous System
CNS
composed of
brain
development
at 4 weeks
forebrain
at 5 weeks
telencephalon
adult
cerebrum
diencephalon
adult
thalamus
hypothalamus
midbrain
5 weeks
mesencephalon
adult
midbrain
hindbrain
at 5 weeks
metencephalon
adult
cerebellum
pons
myelancephalon
adult
medulla oblongata
lobes
frontal
functions
thinking
organizing
planning
problem solving
memory
attention
movement
parietal
function
perception
integration of senses
occipital
vision
temporal
function
smell
taste
sound
formation and storage of memories
spinal cord
PNS
divided into
afferent system
receptors to CNS
efferent system
CNS to effectors
divided into
somatic
mostly voluntary
autonomic
involuntary
divided into
sympathetic
involves
fight or flight
parasympathetic
involves
"rest or digest"
Neuron
structure
in order of signal propogation
dendrites
cell body
nucleus
axon hillock
axon
signal velocity increased by
myelin sheath
saltatory conduction
along
nodes of Ranvier
axon terminal
signal conduction
resting potential
-70mV
established by
sodium
potassium
acetycholine
stimulates
opening of Na+ voltage-gated channels
causing
membrane potential to depolarize
threshold reached
rapid influx of + charges
after peak of AP
repolarization
hyperpolarization
refractory period
return to
resting potential
both
-50mV
membrane potential established by
difference in electrical charge on 2 sides of the membrane
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