Shared Flashcard Set

Details

TSM 11
Neuromuscular Junction and Synaptic Transmission
10
Medical
Undergraduate 2
11/12/2012

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Cards

Term
Can either the peripheral or central nervous system regenerate?
Definition
Only PNS
Term
What is the role of a neuromuscular junction?
Definition
It uses ACh to connect nerves to muscles
Term
What kind of receptor is the ACh receptor?
Definition
A nicotinic receptor
Term
How many subunits is the ACH receptor comprised of?
Definition
5
Term
What is the role of the alpha subunits in the ACH receptor?
Definition
They bind ACh. 2 molecules are required
Term
How does muscle depolarisation occur?
Definition
The ACh receptor causes a K+ efflux and Na + influx via a non-selective cation channel
Term
What is a skeletal muscle depolarisation called?
Definition
An end-plate potential
Term
What does curare do?
Definition
It binds to ACh receptors and is used to achieve surgical paralysis
Term
What does botulinum toxin do?
Definition
Prevents ACh release from vesicles and is used locally to treat dystonia
Term
What does myasthenia gravis do?
Definition
It is an antibody against the ACH receptor and block transmission causing weakness and fatigue
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