spierstelsel Flashcards

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1
Q

glad spier

A

myocyten
elke met één kern
in bloedbaten en want van spijsvertering
onvrijwillig
transport

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2
Q

hartspieren

A

myocyten
enkele kern
gestreepte cellen
wand van hart
onvrijwillig
pompen bloed

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3
Q

skeletspier

A

myocyten
meerdere kernen
gestreepte cellen
spier van skelet
vrijwillig
beweging, steun, constante temp behouden, bescherming
+ transport naar cardio

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4
Q

structure skelettier

A

myocyt
- sarcolemma: bevat glycogeen met duizenden myofibrillen
- sarcoplasma
- sacroplasmatisch reticulum: calcium opslaan, die spieren doet samentrekken)
bundels spiervezels
omgeven door bindweefsel
omgeven door fascia

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5
Q

origin

A

bevestigd spier aan stilstaan bot

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6
Q

insertion

A

aan bewegend bot

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7
Q

samentrekking spier

A

zenuwimpuls -> ach vrijgegeven > calcium bindt met tropen > actie gaan schuiven > myosin binden aan sites > actie filamenten naar centrum van sacreren samengetrokken

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8
Q

myasthénia gravis

A

immuunsysteem valt avethylcholinereceptoren

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9
Q

isotone contractie

A

kracht beweging

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10
Q

isometrisch contractie

A

langdurig contractie zonder beweging

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11
Q

tetanus

A

frequente inspanning/stiumulatie > kan niet onstpannen > spiervermoeidheid

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12
Q

slow switch vezels

A

langzaam, veel mitochondtion , veel myoglobine (rode kleur want bloedtoevoer)

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13
Q

gast switch

A

anaeroob, snel ATP afbraak
adj van créatine
snelle uitbarsting van energie
wit want geen bloedstroom

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14
Q

spierdystrofie

A

te veel calcium > spierfalen

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