Summary
Samenvatting Weefsels H8: Zenuwweefsel
- 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 zenuwweefselInhoud
1.1 Inleiding............................................................................................................................................2
1.2 Neuronen..........................................................................................................................................2
1.2.1 Perikaryon..................................................................................................................................2
1.2.2 Dendriet.....................................................................................................................................3
1.2.3 Axon...........................................................................................................................................3
1.2.4 Verschillende types neuronen...................................................................................................4
1.3 Synapsen...........................................................................................................................................5
1.3.2 Opbouw.....................................................................................................................................5
1.3.3 Algemene indeling chemische synapsen....................................................................................5
1.3.3.1 Interneuronale synaps........................................................................................................5
1.3.3.2 Neuro-effectorsynaps..........................................................................................................5
1.4 Neuroglia of steunweefsel................................................................................................................6
1.4.2 Centraal zenuwstelsel................................................................................................................6
1.4.2.1 Ependymcellen...................................................................................................................6
1.4.2.2 Microgliacellen....................................................................................................................7
1.4.2.3 Astrocyten...........................................................................................................................7
1.4.2.4 Oligodendrocyten...............................................................................................................7
1.4.3 Perifeer zenuwstelsel.................................................................................................................8
1.4.3.1 Mantelcellen.......................................................................................................................8
1.4.3.2 Schwanncellen....................................................................................................................8
1.5 Zenuwvezels.....................................................................................................................................8
1.5.2 Zenuwvezels in het perifeer zenuwstelsel..................................................................................8
1.5.2.1 Mergloze zenuwvezel..........................................................................................................8
1.5.1.2 Merghoudende zenuwvezel................................................................................................8
1.5.2 Zenuwvezels in het centraal zenuwstelsel.................................................................................9
1.5.2.1 Merloze zenuwvezel............................................................................................................9
1.5.2.2 Merghoudende zenuwvezel................................................................................................9
1.6 Centraal zenuwstelsel.......................................................................................................................9
1.7 Perifeer zenuwstelsel........................................................................................................................9
1.8 Bindweefselhulzen..........................................................................................................................10
1.9 Degeneratie & regeneratie.............................................................................................................10
1.9.1 In het perifeer zenuwstelsel.....................................................................................................10
1
, 1.9.2 In het centraal zenuwstelsel....................................................................................................11
1.1 Inleiding
- Functie
o Analyseren + groeperen + beantwoorden van stimuli/prikkel van binnen/buiten af
o Geven prikkels door aan 2e zenuwcel of aan doelwit cel (spieren & klieren)
- Specifieke eigenschap
o Prikkelbaarheid
Wijzigen ionengradiënt= wijziging in membraanpotentiaal zetten prikkel
om in depolarisatiegolf door ion kanalen te openen = actiepotentiaal
Prikkel weg repolarisatie alles terug naar rustpotentiaal
Rust
In cel: kalium & -
Buiten cel: natrium & +
-70 mV
Kalium naar binnen
Natrium naar buiten
Depolarisatie= actiepotentiaal
+20 mV
Natrium gaat naar binnen
In cel: +
Buiten cel: -
Repolarisatie
- 70mv
Kalium gaat naar buiten
In cel: -
Uit cel: +
- Componenten
o Neuronen of zenuwcellen met uitlopers
o Steuncellen of gliacellen
o Beschermend bindweefsel
Enkel rond perifeer zenuwstelsel
1.2 Neuronen
- = eigenlijke zenuwcellen
- Ontvangen + integreren + doorgeven van prikkels
- Neuron= eenheid van het zenuwstelsel
- Geheel van uitlopers= neuropilemma
o Uitlopers kunnen zeer lang zij van teen naar ruggenmerg: 1m
- Kunnen meerdere dendrieten hebben
- Hebben max. 1 axon kunnen ook geen axon hebben
1.2.1 Perikaryon
- = eigenlijke cellichaam
- Verwerkt stimulus/informatie
- Bestaat uit centraal gelegen kern met nucleool
o Euchromatisch hoge eiwitsynthese
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 $3.21. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52510 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now