Summary
Samenvatting Weefsels H7: Spierweefsel
- Course
- Institution
Samenvatting gebaseerd op slides van professor Vral met bijhorende notities van in de les, alles wat je voor de theorie moet kennen van dit onderdeel.
[Show more]
Seller
Follow
beexxx
Content preview
Samenvatting spierweefselInhoud
1.1 Inleiding............................................................................................................................................2
1.2 Skeletspierweefsel............................................................................................................................2
1.2.1 Lichtmicroscopisch.....................................................................................................................2
1.2.2 Elektronenmicroscopisch...........................................................................................................3
1.2.2.1 Moleculaire structuur van actine en myosine.....................................................................4
1.2.3 Contractiemechanisme: sliding filament principe......................................................................5
1.2.4 Varianten van skeletspieren.......................................................................................................5
1.2.5 Groei en regeneratie..................................................................................................................6
1.3 Hartspierweefsel...............................................................................................................................6
1.3.1 Lichtmicroscopisch.....................................................................................................................6
1.3.2 Elektronenmicroscopisch...........................................................................................................7
1.4 Glad spierweefsel.............................................................................................................................8
1.4.1 Lichtmicroscopisch.....................................................................................................................8
1.4.2 Elektronenmicroscopisch...........................................................................................................8
1.4.3 Spiercontractie...........................................................................................................................9
1.5 Vergelijkende tabel...........................................................................................................................9
1
, 1.1 Inleiding
- 3 types
o Skeletspierweefsel
o Hartspierweefsel
o Glad spierweefsel
- Functie
o Contractie
Tot expressie brengen van actine & myosine
Spiercellen zijn zelf verantwoordelijk voor contractie weinig ECM
o Conductie doorgeven contractiesignaal van ene naar andere cel
- Spier spierbundel spiervezel myofibrillen myofilamenten moleculen van actine
& myosine
- Spiercellen kleuren sterk met eosine want zitten vol eiwitten ( actine & myosine)
- Bloedvaten gekleurd met orceïne typische kleuring voor elastine bruin-rood
1.2 Skeletspierweefsel
- Stamcellen= myoblasten brengen tijdens embryonale ontwikkeling myosine & actine tot
expressie
- Myoblasten gaan versmelten differentiëren tot eigenlijke skeletspiervezel
o Verschillende kernen die zich perifeer onder celmembraan bevinden
o Aantal myoblasten blijf aanwezig= satellietcellen
Komen in actie als weefsel moet hersteld worden want kunnen
differentiëren
o Diameter: 10-100 µm
groot want meeste cellen +- 10 µm
o Lengte: verschillende cm lang
- Dwarsgestreept
o myosine & actine filamenten schikken zich op bepaalde manier
- Weefsel gehecht aan botten
1.2.1 Lichtmicroscopisch
- Longitudinale/overlangse doorsnede
o Meerdere + perifeer + platte gelegen kernen
o Dwarsstreping
Donkere A band (anistrope)
Lichte I band (isotrope)
Z band
Soms te zien met LM als je goede coupe hebt
Altijd te zien met EM
te maken met lichtbreking wanneer je spierweefsel onder microscoop
bekijkt
o Fijne lengtestreping
- Dwarsdoorsnede
o Grote polygonale cellen polygonale structuur= lijnen
o 1 of 2 perifeer gelegen kernen
2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller beexxx. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.18. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
51662 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 15 years now