Class notes
Nervous system
- Course
- Institution
- Book
in depth notes for nervous system
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
Muscle Physiology paper 2 lecture notes
-
Muscle physiology part 1
-
neuronal signalling
Seller
Follow
uneebihsan28
Content preview
Nervous system can be split into CNS and PNSCNS is spinal cord and brain.
PNS is the nerves and ganglia.
- Somatic
- Autonomic
- Enteric (digestive system)
Cells of the nervous system
Glial cells
Accessory cells that help the neurones in its function. There are different types:
1. Astrocytes- helps with regulating synapses but don’t send signals themselves.
2. Ependymal cells- production and movement of cerebrospinal fluid (CSF)
3. Oligodendrocytes- myelination of axons.
4. Microglia- ‘brain macrophages’, microbes. Protects brain from pathogens.
5. Neurons- messenger cells, allows communication with rest of the body.
Signal comes in via dendrites, travels through the axon and signal goes out via axon
terminals.
At rest, there is a high concentration of sodium ions outside and high concentration of
potassium ions inside therefore a net negative charge inside (-70mV)
The different distribution of ions inside and outside the membrane is what causes electrical
potential across the membrane.
Driving force is determined by BOTH concentration gradient and electrical gradient.
Sodium-potassium pumps
- Maintains concentration gradient.
- Requires ATP
Leak channels
- Always open (passive movement)
- Can establish electrical gradient.
- In neurons- sodium and potassium.
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 uneebihsan28. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.11. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now