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21 Cards in this Set
- Front
- Back
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Ganglia |
Collections of cell bodies outside cns |
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Spinal Nerves |
Nerves which originate in spinal cord |
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Efferent neurons |
Neurons that transmit APs from CNS to effector organs |
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Somatic motor nervous system |
System that send APs from CNS to skeletal muscles |
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Association Neuron |
Neurons that send APs from one neuron to another |
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Excitability |
The ability to create an AP in response to a stimulus. |
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How many axons does a multipolar neuron have?
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1 |
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What is the purpose of a non ciliated ependymal cell? |
They secrete cerebrospinal fluid |
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Nerve sends signal from cps to smooth muscles. is this autonomic nervous system or somatic? |
Automatic |
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What 2 conditions must be met for an axon to regenerate? Do axons in cns regenerate? |
Must be covered in Schwann cells and aligned with severed end; no. |
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during depolarization what is happening to sodium ions? potassium ions?
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S ions are rushing in, P ions- nothing happens |
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The conc. of Pions outside axon is high, conc. of S ions inside is high. Potential difference - or +? |
Negative |
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What has to happen ^ to get back to resting pot.? |
S ions must be pumped out of the axon and P ions must be pumped in |
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Stimuls on neuron does not result in an ap. what 2 reasons? |
Stimulus could be sub threshold, axon might be in absolute refractory period |
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an AP travels along an axon by sipping from nodes. what kind of conduction? faster of slower? |
saltatory conduction, faster |
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compare max pot. diff. of each indiv. AP before and after your little brother turned radio way up. |
no difference between max pot difference |
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Compare the frequency of APs running from your ears to the cps before and after ^ |
freq of aps is greater AFTER |
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# and freq. of aps is same in cps as receptor. did signal travel through synapse? |
It did NOT |
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Compare the freq. of APs in the presynaptic and postsynaptic neuron |
Lower in POST than in PRE |
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at synapse, P channels are opened at postsynaptic membrane due to release of neurotransmitters Is this inhibitory of excitatory synapse? |
inhibitory |
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Signal starts in one receptor and creates ap in many diff places in cps and pns. What kind of neuron arrangement did it pass through? |
divergent circuit |
