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15
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Where is, and how large is your sciatic nerve?
The size of your little finger, and from your lower back, through your butt and down your leg. It is the largest nerve in your body
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15
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What are cranial nerves?
a set of twelve nerves that originate in the brain and are responsible for sense or movement in the head, neck, and facial regions
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15
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compare the frequency of the action potentials of when you touch something hot vs something warm.
The frequency is greater when you touch something hot than when you touch something warm.
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banana
Go to last place!
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fairy
Take points!
5
10
15
20
25
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shark
Other team loses 5 points!
Okay!
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thief
Give points!
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15
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25
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heart
Other team wins 15 points!
Oops!
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seesaw
Swap points!
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rocket
Go to first place!
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banana
Go to last place!
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15
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What do schwann cells do?
They insulate the axons in the PNS, so the action potential can travel more efficiently
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15
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What is the difference between the sympathetic and parasympathetic nervous systems.
Sympathetic - fight or flight, parasympathetic - rest and repose (digestion, urination)
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25
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synapse diagram name a, f, g, h, e.
a- Calcium, f- action potential, g- presynaptic neuron, h- synaptic vesicle, e- synaptic cleft
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15
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What are Ganglia?
collection of nerve bodies that are outside the CNS
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15
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What does the author relate the resting potential of a neuron to?
A set mouse trap at rest but ready to spring (p210)
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Does a neuron at rest have a potential difference between the inside and the outside of the cell?
Yes according to the book a typical potential difference is -85mV, according to the video an average potential difference is -70mV
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heart
Other team wins 25 points!
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shark
Other team loses 5 points!
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gift
Win 15 points!
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thief
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25
15
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What do neurotransmitters do?
They pass an action potential across a synapse. Neuron to neuron or neuron to muscle (p211)
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15
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Why is it important that we have an intact blood brain barrier? What cells do this for us?
Many normal substances in the blood are toxic to neurons, astrocytes.
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25
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nerve diagram, label a, b, c, d, e.
a- epineurium b-fascicle c-axon d- endoneurium e-perineurium
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15
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Why canโt an action potential flow both ways down an axon?
Immediately after the action potential, that part of the axon is in its absolute refractory period (a time when no action potential can be stimulated)
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