CBNS 120 MIDTERM 2 QUESTIONS WITH VERIFIED ANSWERS

CBNS 120 MIDTERM 2 QUESTIONS WITH VERIFIED
ANSWERS


Correct 98

Incorrect 00




1 of 98

Term


Following release of glutamate at excitatory hippocampal synapses,
the following events occur as pyramidal neurons respond to the
transmitter at a resting potential of -80 mV:


- AMPA receptors open
- NMDA receptors open
- AMPA receptor current flows
- NMDA receptor current flows
- CNQX blocks the synaptic response
- APV blocks the synaptic response



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ampa receptors open, nmda
cAMP, HCN channel, voltage- receptors open, ampa receptor
dependent activation, positive

, current flows, CNQX blocks the
synaptic response.

Gi -> inhibits adenylate cyclase -> Gq -> activates PLC -> cleaves PIP2 ->
decreased cAMP -> K channels activates IP3 -> Ca diacylglycerol ->
opened -> inhibition protein kinase C


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2 of 98

Term



Astrocytes contribute to synapse formation via:


A. secretion of Hevin
B. secretion of thrombospondins (TSPs)
C. release of TGF-beta
D. all of the above
E. A and B only



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d true




c e


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, 3 of 98

Term



MEPPs
E) a) and c) only
C) are quantal events
A) are spontaneous events
D) all of the above
B) occur because of motoneuron activity



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c e




a d


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4 of 98

Term



Activation of the GIRK channel makes the Vm :
b) More positive
a) More negative
c) No change



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, d e




b a


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5 of 98

Term



At the vertebrate neuromuscular synapse, the reversal potential (EEPC)
is approximately equal to:


A. EK
B. ENa
C. ENa-EK
D. None of the above



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d a




c Na ions and K ions


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