NROB60 FINAL NOTES Exam Questions With 100% Verified Answers
8 views 0 purchase
Course
NROb60
Institution
NROb60
NROB60 FINAL NOTES Exam Questions
With 100% Verified Answers
Properties of the action potential - answerrising phase
overshoot
falling phase
undershoot
What happens when the current reaches threshold? - answergenerate APs at a low rate
What happens when current increase? - answerrate of AP g...
they react to changes in polarization of the membrane
- depolarization twists the S4 and this change in the molecule causes the gate to open
What makes the channel more permeable to Na+ ? - answer✔selectivity filter
selectivity filter - answer✔for Na channel:
- partially hydrated Na+ can fit through the pore but the partially hydrated K+ ion cannot since it
is TOO BIG
Functional properties of Na+ Channel - answer✔- threshold open up the sodium channel and
sodium can rush in
(open almost immediately)
- stays open for about 1msec then inactivates (Mg 2+ blocks it ) --> after Na+ rushes in
(this rapid opening of channels in response to depolarization explains the rising phase)
- cannot open again until voltage reduces to below threshold
- another AP cannot be generated until the channels are activated
Tetrodotoxin - answer✔could selectively block Na channel
clogs the Na permeable pore by binding tightly to a specific site on the OUTSIDE OF THE
CHANNEL
concentrated in clams, mussels, and other shellfish that feed on these organisms
marine protozoa
Batrachotoxin - answer✔- causes the channels to open at more negative potentials and to stay
open much longer than usual
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 Brainbarter. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
