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BMSC207- Module 4 Test with Questions and 100% Correct Answers
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BMSC207- Module 4 Test with Questions and 100%Correct Answers
what does the neurotransmitter binding depend on? - Answer the concentration in the
cleft
does a strong or weak stimulus release more neurotransmitters? - Answer Strong
stimulus releases more neurotransmitters
what are convergent pathways? - Answer many presynaptic neurons may converge
on one or small number of postsynaptic neurons
what are divergent pathways - Answer neurons can have branching axons that
contact many different postsynaptic neurons
when does spatial summation occur? - Answer when the currents from multiple
nearly simultaneous graded potentials combine
what is spatial summation? - Answer the summation of graded potentials in a
postsynaptic neuron from multiple sources
can spatial summation be inhibitory? - Answer yes
, what happens to graded potentials from the same presynaptic neuron arriving at the
trigger zone near simultaneously? - Answer they may be summated
where may the excitatory or inhibitory neurons synapse? - Answer on synaptic
terminals (axo-axonic synapse) and augment communication between the pre and
postsynaptic cell
what does presynaptic inhibition do? - Answer inhibits neurotransmitter release
what does presynaptic facilitation do? - Answer increase neurotransmitter release
is it global presynaptic inhibition or selective presynaptic inhibition that there is
no response? - Answer - global presynaptic inhibition is when there is no response
- with selective presynaptic inhibition there is still neurotransmitters released
how can synaptic activity be altered? - Answer by changing the target
(postsynaptic) cell's responsiveness to neurotransmitter
what is action potential? - Answer rapid and uniform electrical signal conducted down
a cell membrane
what is convergence? - Answer multiple presynaptic neurons providing input to
a smaller number of postsynaptic neurons
what is divergence? - Answer a small number of presynaptic neurons branching to
affect a larger number of postsynaptic neurons
what is a neurocrine receptor? - Answer a cellular protein that binds to a
neurocrine secreted from a neuron
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