Chapter 7 review Flashcards

1
Q

consists in the cns

A

brain and spinal cord

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2
Q

What makes up the PNS

A

nerves outside the cns

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3
Q

what are satelite cells

A

protect neuron cell bodies

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4
Q

What are schwann cells

A

produce myelin sheath in PNS

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5
Q

What are Oligodendrocytes

A

wrap their extensions around the nerve, form myelin sheath in the cns

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6
Q

what is the function of microglia

A

dispose of debris - dead cells and bacteria

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7
Q

what are ependymal

A

circulate cerebrospinal fluid in the cilia

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8
Q

what are astrocytes

A

star-shaped, form barrier between capillaries and control chemical environment

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9
Q

what do schwann cells do

A

produce myelin sheath

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10
Q

what do nodes of ranvier do

A

gaps between myelin sheath

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11
Q

what are the 2 parts neuron

A

cell body and processes

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12
Q

what is nissle substance

A

specialzed rough endoplasmic reticulum

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13
Q

what is neurofibrils

A

intermediate cytoskeleton that mainatins cell shape

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14
Q

what are bundles of fibers that are found in the CNS called

A

tracts

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15
Q

What are bundles of fibers that are found in PNS called

A

nerves

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16
Q

Ganglia

A

collections of cell bodies outside the central nervous system

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17
Q

gray matter

A

outer layer; unmyelinated fibers and cell bodies

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18
Q

white matter

A

myelinated fibers, found in gray matter

19
Q

what are efferent

A

travels away from cns

20
Q

what are afferent

A

travels away from stimulus to cns

21
Q

what are inter

A

connect sensory and motor neurons

22
Q

multipolar

A

many extensions from cell body

23
Q

bipolar

A

one extension and one cell body

24
Q

unipolar

A

single short process leaving the cell body

25
ratio sodium/potassium
3/2
26
action potential is _______________
all or nothing
27
At rest the membrane is
polarized
28
action potential causes the membrane to be
depolarized
29
sequence of action potential
membrane becomes depolarized, sodium rushes in, potassium rushes out, sodium potassium pump replaces it, can't go again until goes all the way through
30
synaptic cleft
gap between adjacent neurons
31
synapse
junction between nerves
32
2 main functions of neurons
irritability and conductivity
33
irritability
ability to respond to stimulus
34
conductivity
the ability to transmit a message
35
what are the 3 parts of the brainstem
medullary oblogata, pons, midbrain
36
stroke
brain clots in the brain
37
heart attack
blood clots in the heart
38
temporal
auditory and encoding memory
39
parietal
controls senses
40
frontal
higher level thinking, voluntary movement
41
occipital
visual, color
42
pons
controls breathing
43
cerebral spinal fluid
shock absorber