Anatomy Test Flashcards
Name of the cell that sends signals around our body
Neuron/Nerve Cell
2 Divisions of Nervous SYSTEM
Brain + Spinal Cord
How are the BBBBrain + Spinal Cord different?
Brain- 100 BBBBillion nerves
Spinal Cord- 100 Million nerves
Job of DendRIte
Receive info
Cell BOdy job
PrOcess info
AxoN Hillock job
Sends Nerve Impluses
Myelin job
Protects axon
Nodes job
Jumpin is an action hint hint
Allow the action potential to go really fast
Axon terminal job
Branch to meet other neurons & the location where chemical signals occur
Signal at rest?
-70mV
What changes cause a signal to be sent?
Use ions & mV
Na+ and K+ travel through axon which changes the mV which means that the signal is being sent
What cells make myelin?
Neurons
Purpose of myelin?
Insulate & speed up signals
What cannot flow through myelin?
Ions
What is it called when the signal “jumps”?
Nerve impulse
Why do signals jump?
Speed up the signal
What part of the axon does the signal jump to?
Node to node
5 steps of axon terminal?
1) Signal reaches axon terminal
2) Cause vesicles containing neurotransmitters to fuse w cell membrane
3) neurotransmitters defuse into synapse
4) NT final their specific receipt on post synaptic cell
5) other neuron then changes NT back into electric one
What is the function of the brain stem ?
Automatic survival functions
Breathing, heart beat, etc.
3 part of brain stem
Medulla
Pons
Mid brain
Limbo system function
Cough cough melin softly says
Controls eating, drinking, emotions, sex & hunger drives
Structured & their functions in limbic system
Thalamus- receives + transmits sensory info to recipient
Hypothalamus- controls eating, drinking, & body temp
Amygdala- linked to emotion+fear
(Oh MYYY!!-fear)
(T-transmit)
(Hypo=Hippo=fat=eating, drinking)
FronTal lobe function / location
Talk/Speech, judgment, movement
Top left
Parietal function/location
Touch, sensory cortex
Top right
Occipital function/location
Vision Right middle (eyes in back of head)
Cerebellum function/location
Coordinates voluntary movement
Only one on the lines
Pons function/location
Sleep,REM sleep
Bottom Preggo part of stem closer to eyes cuz lower & sleep
Mid brain function/location
Motor movement audio/visual processing
Top preggo
What structure connects the 2 brain hemispheres?
Corpus callosum
What does it mean when brains are plastic/exhibit neuroplasticity
Ability of brain to reorganize & make new connections between neurons
Order of neurons+function when hand touches hot stove
Sensory neurons receive stimulus of hot stove
Nerve impulse sent to brain & interneurons decide u must move hand
Motor neurons send signal to hand to quickly remove from stove
Diagram
🤯
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| \
| \_
|_~_|
Hand= sensory to brain through spinal cord
Interneurons in brain back down
Motor down to hand to move
