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WorksheetsSynaptic transmission 2
Total questions: 10
Worksheet time: 5mins
Where does the action potential begin?
Cell body
Dendrites
Initial segment of axon
Soma
A famous toxin known as botulinum B is used by aesthetic physicians to remove wrinkles. This works by inhibiting exocytosis of acetylcholine by inhibiting which SNARE protein.
Syntaxin
Syanptobrevin
SNAP 25
Synaptotagmin
A chemical synapse, as opposed to an electric synapse, :
Can transmit signals with longer distance
Can transmit signals with reciprocal direction
Makes use of actual physical contact to conduct electric signals
Has no delay in transmission
The neurotransmitter, dopamine, is secreted from:
Locus ceruleus
Substantia Nigra
Spinal cord
Median raphe of brainstem
The following may cause inhibition of post-synaptic cell EXCEPT:
Opening of chloride ion channels
Increase in conductance of potassium ions
Activation of receptor enzymes that decrease excitatory receptors
Opening of sodium channels
The following are small molecule, rapidly acting transmitters EXCEPT:
Serotonin
Glycine
Nitric Oxide
Carnosine
Neurotransmitter can either be excitatory, inhibitory or both. Which neurotransmitter has no excitatory effect?
Acetylcholine
Norepinephrine
Dopamine
Glycine
Specific ions can be found at different concentrations intracellularly and extracellularly. Which ion is least likely found in the extracellular space?
Potassium
Sodium
Chloride
Bicarbonate
Physostigmine is a toxin that affects synaptic transmission. Which part of the transmission does it affect?
The opening of potassium channels
The release of acetylcholine from vesicles
The opening of calcium channels that bind to synaptotagmin
The breakdown of acetylcholine
Which protein is responsible for the disassembly of SNARE complex?
Alpha Snap
SNAP 5
SNAP 20
Synaptotagmin
