Shared Flashcard Set

Details

Neurosciences
Central Synaptic Mechanisms
13
Medical
Graduate
05/10/2009

Additional Medical Flashcards

 


 

Cards

Term
Does a neuromuscular junction have a high or low safety factor?  What about central neurons?
Definition

NMJ - high safety factor

 

Central neuron - low safety factor

Term
What types of synapses are usually excitatory?  inhibitory?
Definition

Excitatory - axodendritic

 

Inhibitory - axosomatic

Term
Where are metabotropic synapses usually found?  What is their purpose?
Definition

They are typically found at modulatory axoaxonic synapses

 

They gate ion channels indirectly

Term
What are the two types of Glutamate gated receptors in the brain?
Definition
NMDA receptors and non-NMDA (AMPA and kainate) receptors
Term
Non-NMDA receptors are the major postsynaptic players in what type of response?
Definition
Excitatory post-synaptic potential (EPSP)
Term
With regards to permeability, how do NMDA and non-NMDA receptors differ?
Definition
NMDA receptor channels are permeable to Ca2+
Term
NMDA receptors are blocked by what?
Definition
Mg2+
Term
NMDA receptors play a direct role in what types of cognitive functioning?
Definition
Associative learning and memory installment and consolidation
Term
How is the Mg2+ removed in NMDA receptors?
Definition
If the rate of stimulation is high, Mg2+ block is relieved by a greater depolarization of the postsynaptic membrane potential and calcium enters the postsynaptic neuron through the NMDA receptors
Term
IPSPs result from the activation of postsynaptic receptors that cause an increase in conductance to which ions?
Definition
K+ or Cl-
Term
Angelman syndrome is due to a mutation of what receptor?
Definition
GABAA
Term
Startle disease is due to a mutation of what receptor?
Definition
Glycine
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