PSL 425 Final Exam with 100% correct answers 2024

What are post synaptic potentials that result from the opening of a small number of channels in the postsynaptic membrane even in the absence of nerve stimulation called? correct answers Miniature post synaptic potentials Based on the cause of Myasthenia Gravis, what compound would be a suitable form of treatment? correct answers AChE inhibitors What are vesicles that contain nonpeptide neurotransmitters called? correct answers Clear synaptic vesicles What effect does inhibition of AChE have on the postsynaptic EPP? correct answers Increases the amplitude What is the mechanism by which both tetanus and botulinum toxin inhibit neurotransmitter release? correct answers Cleave SNARE proteins What is a feature electrical synapses have that chemical synapses do not? correct answers Small separation between cells Which neurotransmitter receptor type mediate fast synaptic responses that occur on a millisecond time scale? correct answers Ionotropic receptors Glycine-activated and GABAA channels are permeable to anions such as Cl− and produce primarily __________. correct answers inhibitory currents How may facilitation occur? correct answers Increase in mean number of quanta per nerve stimulus What is the consequence of lowering extracellular calcium on transmitter release and thus the amplitude of the end-plate potential? correct answers Decrease Which of the two competing hypotheses that emerged in the 19th century to explain how closely apposed cells could communicate eventually proved correct? correct answers Neuron doctrine Reticular theory What is the basis for differences in nicotinic AChRs? correct answers Subunit composition What is ultimately responsible for depolarization block in the NMJ? correct answers Inactivation of voltage-gated sodium