Nervous system conti -? Flashcards
what does the nervous system aid in
response (reaction) to an outside force (stimulus)
what is the nervous system critical for
survival
what does the nervous system involve
5 senses (actions)
what are the 5 sense organs
eyes, nose, mouth, fingers, ears
function of NS
sends messages
how does the NS compare to the endocrine system
NS: nerves, fast message, over after sent fast Endocrine: chemical> hormones> glands> blood slow message last longer
neuron
specialized nerve cell
where are most neurons
brain and spinal cord
how is the regeneration on neurons
little regeneration
regeneration
ability to grow back
axon
long arm
myelin
fat that covers axon (white matter, fat, schwann cell)
different names for myelin
schwann cell, fat, white matter
gray matter
no myelin
function of axon
carries messages away to the dendrites of the next neuron
dendrites
short arms
function of dendrites
pick up messages from the axon of the other neuron
synapse
space between neurons
neurotransmitters
released in bubbles
too much neurotransmitters released
parkinsons
what chemicals are released by the neurotransmitters
acetylcholine
dopamine
cholinesterase
acetylcholine abbreviation
ACh
function of cholinesterase
shuts of cholinesterase
where do there chemical get released into
muscle
what is the energy source of a message transmission
ATP
what kind of response does a message carry
all or none
polarized nerve
resting potential
where are NA+ and K+ in a polarized nerve
NA+ outside
K+ inside
what is NA+
sodium
what is K+
potassium
where are NA+ and K+ in a depolarized nerve
K+ outside
NA+ inside
what happens during the stages of a depolarized nerve
- imbalance of ions and acetycholine released into synapse (bubbles released)
- contraction of muscles
what happens during repolarized nerve
the action is terminated and NA+ and K+ go back to original positions
- NA+ outside
- K+ inside
nerve
a bunch of neurons
function of nerves
sends messages to muscles to move
basis of multiple sclerosis
scars on neurons
what happens to the myelin in multiple sclerosis
eaten away by WBC and T cells
symptoms of multiple sclerosis
tingling, paralisis, loss of equillibrium, blurry vision, headaches, muscle spasms, numbness
is there a cure for MS
no
what condition might be connected to MS
chicken pox
describe the disease type of MS
autoimmune, progressive
meaning of mysasthenia
muscle
meaning of gravis
serious
describe myasthenia gravis
low amount of acetylcholine produced at neuromuscular junction
symptoms of myasthenia gravis
weak, tired, facial muscles fatigued
another word for poison gas
curare
function of cholinesterase
shuts of cholinesterase
where do there chemical get released into
muscle
what is the energy source of a message transmission
ATP
what kind of response does a message carry
all or none
polarized nerve
resting potential
where are NA+ and K+ in a polarized nerve
NA+ outside
K+ inside
what is NA+
sodium
what is K+
potassium
where are NA+ and K+ in a depolarized nerve
K+ outside
NA+ inside
what happens during the stages of a depolarized nerve
- imbalance of ions and acetycholine released into synapse (bubbles released)
- contraction of muscles
what happens during repolarized nerve
the action is terminated and NA+ and K+ go back to original positions
- NA+ outside
- K+ inside
nerve
a bunch of neurons
function of nerves
sends messages to muscles to move
basis of multiple sclerosis
scars on neurons
what happens to the myelin in multiple sclerosis
eaten away by WBC and T cells
symptoms of multiple sclerosis
tingling, paralisis, loss of equillibrium, blurry vision, headaches, muscle spasms, numbness
is there a cure for MS
no
what condition might be connected to MS
chicken pox
describe the disease type of MS
autoimmune, progressive
meaning of mysasthenia
muscle
meaning of gravis
serious
describe myasthenia gravis
low amount of acetylcholine produced at neuromuscular junction
symptoms of myasthenia gravis
weak, tired, facial muscles fatigued
another word for poison gas
curare
