PSB Exam 1 Study Guide Questions and Correct Answers/ Latest Update / Already Graded

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PSB Exam 1 Study Guide Questions and
Correct Answers/ Latest Update /
Already Graded
Depolarization of the axon terminal causes influx of what ion?


Ans: Calcium




What is triggered by influx of the ion listed above?


Ans: exocytosis




What are the two basic mechanisms for inactivation neurotransmitter

in the synaptic cleft?


Ans: After a chemical is released, it must be inactivated. Inactivation can

be through a reuptake mechanism or by an enzyme that stops the action

of the chemical.




Neurotransmitters:

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Ans: communicate locally across


the synapse




Neuromodulators:


Ans: communicate with target cells more distant than the synapse by

diffusing away from the point of release




A _____________ synapse is comprised of an axon of a "transmitting"

neuron synapsing on the dendrite of a "receiving" neuron


Ans: axo dendritic




List one catecholaminergic drug and its effects on synaptic

transmission, being sure to indicate which catecholamine the drug

affects


Ans: Cocaine, no re-uptake of dopamine so there is a ton of dopamine in

synaptic cleft making guy have a lot of euphoria

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The anti-psychotic drug haloperidol is particularly selective for

dopamine _______ receptors..


A) D1


B) D2


C) D3


D) auto-


Ans: B) D2




Most antipsychotic medications act by blocking _______ receptors.


A) serotonergic


B) dopaminergic


C) cholinergic


D) muscarinic


Ans: B) dopaminergic




List one cholinergic drug and its effect on synaptic transmission