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CLTM > Neuron Anatomy > Flashcards

Neuron Anatomy Flashcards

1
Q

-individual nerve cells
-over 25billion
-1mm or as long as 1m

A

Neuron

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2
Q

-short
-many or one
-no myelin
-graded potential

A

Dendrites

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3
Q

-Nucleus
-no myelin
-graded potential

A

Cell Body

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4
Q

-Projects from cell body
-single axon
-contact w/ other neurons
-branch into synaptic knobs

A

Axon

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5
Q

-Vesicles containing neurotransmitters
-Potential propagates and release
-myelin

A

Axon

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6
Q

-separated by the synaptic cleft
-causes a graded potential
-may have delay

A

Chemical Synapse

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7
Q

-physically bound
-no delay in crossing

A

Electrical Synapse

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8
Q

-Maintain specific concentration
-requires cellular energy
-sodium/potassium/calcium

A

Neuron Pumps

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9
Q

Initiate

A

Excitability

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10
Q

Propagate

A

Conductivity

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11
Q

-presynaptic potential crosses the cleft into postsynaptic potential

A

Electrical Potential

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12
Q

-EPSP
-IPSP

A

types of Electrical Potential

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13
Q

-depolarize or hyperpolarize
-EPSP or IPSP
-threshold turns into action potential
-more EPSP needed than IPSP to reach threshold

A

Graded Potential

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14
Q

moves from negative to positive-propagates AP

A

Depolarization

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15
Q

returns from positive back to negative-resets the membrane

A

Repolarization

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16
Q

often goes beyond original negativity-causes refractory period

A

Hyperpolarization

17
Q

maintains rhythmicity

A

thalamus

18
Q

attenuated by

A

RAS

19
Q

-attenuation
-spatial spread
-orientation of generators
-frequency

A

4 dependent factors for amplitude of EEG

20
Q

-CNS and PNS
-smaller
-reproduce
-do not transmit
-assists w/ function of neurons
-nourish, protect, and support neurons
-half of volume

A

Glial Cells

21
Q

-blood brain barrier
-structural support

A

Astrocytes

22
Q

-choroid plexus
-csf

A

Ependymal

23
Q

-remove dead and damage tissue

A

Microglia

24
Q

myelin sheath in CNS

A

Oligodendrocytes

CLTM (30 decks)

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