A2 Unit F214 - Communication, Homeostasis and Energy
Summary
neuronal communication summary
14 views 0 purchase
Course
A2 Unit F214 - Communication, Homeostasis and Energy
Institution
OCR
a coincise summary on neuronal communication, covering every part of the specification
diagrams included for better view of different types of structures in the nervous system
A2 Unit F214 - Communication, Homeostasis and Energy
All documents for this subject (31)
Seller
Follow
erikakumar
Reviews received
Content preview
Neuronal communication
Sensory receptors
○ Convert stimulus into a nerve impulse = TRANSDUCER
○ Specific to a single type of stimulus
TYPES
Mechano Pressure and movement
Chemo Chemicals
Thermo Heat
Photo Light
PACINIAN CORPUSCLE
○ Deep within skin
○ Detect mechanical pressure
○ Within joints to indicate which joint is changing direction
STRUCTURE
End of the sensory neurone is within the centre, surrounded by layers of connective
tissue
In the membrane there are Na+ channels
At the neuron ending, stretch-mediated Na+ channels change shape when stretched
, 2
Converting MECHANICAL PRESSURE into a NERVOUS IMPULSE
1) At resting potential, stretch-mediated Na+ channels are too narrow
2) Stimulated by pressure: corpuscle changes shape and the surrounding
membrane stretches
3) Na+ channels widen
4) Na+ diffuse into the cell = depolarised
5) Generator potential = action potential
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller erikakumar. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R82,26. You're not tied to anything after your purchase.
