tesut nervos Flashcards

1
Q

SNP compus din:

A

receptori si nervi

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2
Q

nevrogliile sunt de x ori mai multe decat neuronii

A

10

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3
Q

astrocitele

A

bariera hematoencefalica, izoleaza tesutul nervos lezat

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4
Q

microgliile

A

fagociteaza

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5
Q

unde sunt neuroni bipolari

A

retina, mucoasa olfactiva, urechea interna

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6
Q

organite celulare in corpul neuronului

A

mitocondrii, aparatul golgi, lizozom, corp nissl - reg

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7
Q

lungime axon

A

1m sau la membrul inferior 1.2 m

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8
Q

mielina - componenta a …

A

membr cel schwann si oligodendrocite

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9
Q

boala provocata de deteriorarea mielinei

A

scleroza multipla

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10
Q

partea ext e mielinei =

A

neurilema

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11
Q

rol neurilema

A

regenerarea neuronilor lezati

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12
Q

epinerv

A

tesut conj fibros

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13
Q

perinerv

A

in jurul fiecarui fascicul nervos

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14
Q

valoare potential de repaus

A

-70mV

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15
Q

concentratia ionilor de Na este de x ori mai mare in afara decat in interior

A

10

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16
Q

potentialul de actiune how?

A

se deschid canalele de Na pana la -55mV, dupa canalele de Na voltaj-dependente pana la +35mV - dureaza o miime de secunda

17
Q

repolarizare

A

se inchid canalele de Na, se deschid de K, K iese din celula

18
Q

durata depolarizare-repolarizare

A

<1 milisecunda

19
Q

receptorii de pe membr postsinaptica

A

proteine

20
Q

cate tipuri de neurotransmitatori

A

peste 50

21
Q

acetilcolina

A

placa motorie, SNV, encefal + incetineste ritmul cardiac; descompusa de colinesteraza in sinapsa; stimul cu durata scurta; unii sunt recuperati prin endocitoza

22
Q

noradrenalina

A

neuronii simpatici, encefal, maduva; regleaza activitatea viscerelor si unele functii cerebrale

23
Q

catecolamine

A

adrenalina, noradrenalina, dopamina

24
Q

dopamina

A

encefal, implicata in functii motorii

25
Q

serotonina

A

encefal, maduva; functii mentale, ritmul circadian, regarea somnului si a starii de veghe

26
Q

acid gama aminobutiric

A

encefal, maduva spinarii; inhiba

27
Q

glicina

A

maduva spinarii; inhiba

28
Q

glutamat

A

encefal