HCS 215 Quiz #6/Chapter 8: Synaptic Transmission and
Neural Integration Questions With Complete Solutions
3 fates of NTs in cleft Correct Answers -some are degraded by
enzymes + breakdown products are recycled for new NTs
-some can be actively transported bak to the presynaptic cell in
reuptake
-some simply diffuse out of the cleft
acetylcholine
Yes, acetylcholine is broken down by acetylcholinesterase
before being returned to the presynaptic neuron's axon terminal.
Correct Answers The mechanism by which the
neurotransmitter is returned to a presynaptic neuron's axon
terminal is specific for each neurotransmitter. Which of the
following neurotransmitters is broken down by an enzyme
before being returned?
action potentials occurring at a higher frequency Correct
Answers more NT is released -> stronger communication to the
next neuron in the pathway
alpha and beta Correct Answers An increase in the level of
norepinephrine would affect __________ receptors.
are G protein-linked receptors Correct Answers Metabotropic
receptors __________.
,axoaxonic synapse Correct Answers axon terminals of the
neurons link -> special cuz they modulate the communication at
axodendritic and axosomatic synapses
axoaxonic synapses Correct Answers function as "modulatory
synapses" -> regulate the communication across another synapse
in these, NT from the presynaptic neuron doesn't generate
electrical signals in the postsynaptic neuron
instead, the NT bind to the postsynaptic's terminal membrane
and induces a change in the amount of Ca that enters the
terminal in response to an action potential
this alters the amount of NT released
axodendritic Correct Answers The vast majority of synapses in
the CNS are __________.
axodendritic synapse Correct Answers presynaptic axon to
postsynaptic dendrite
most common !!!!!
axodendritric, axosomatic Correct Answers excitatory and
inhibitory synapses occurs primarily at ______ and ______
synapses
axon terminal Correct Answers the ________ of the
presynaptic neuron releases NTs into the synaptic cleft
, NTs then rapidly diffuse across the cleft and bind to
postsynaptic receptors, producing a response in the postsynaptic
neuron by signal transduction mechanisms
axon terminal's cytosol Correct Answers NTs are synthesized
in the ______________, where synthesis enzymes are
then NTs are actively transported into the vesicles, where they're
stored until their release by exocytosis
axosomatic synapse Correct Answers axon to soma
bidirectional Correct Answers often communication in
electrical synapses is ______, and can be excitatory or inhibitory
at the same synapse
biogenic amines
decrease in these -> depression Correct Answers The two
main biochemicals believed to be associated with depression are
both __________. A third chemical associated with depression
is of the same biochemical type; this chemical is dopamine.
BZ; BZ-1 Correct Answers __________ receptors are targeted
to treat anxiety; __________ receptors are targeted in sleep aids.
calcium, action potentials Correct Answers the amount of NT
released depends on the concentration of _____ in the terminal
cytosol, which depends on the frequency of _____
Neural Integration Questions With Complete Solutions
3 fates of NTs in cleft Correct Answers -some are degraded by
enzymes + breakdown products are recycled for new NTs
-some can be actively transported bak to the presynaptic cell in
reuptake
-some simply diffuse out of the cleft
acetylcholine
Yes, acetylcholine is broken down by acetylcholinesterase
before being returned to the presynaptic neuron's axon terminal.
Correct Answers The mechanism by which the
neurotransmitter is returned to a presynaptic neuron's axon
terminal is specific for each neurotransmitter. Which of the
following neurotransmitters is broken down by an enzyme
before being returned?
action potentials occurring at a higher frequency Correct
Answers more NT is released -> stronger communication to the
next neuron in the pathway
alpha and beta Correct Answers An increase in the level of
norepinephrine would affect __________ receptors.
are G protein-linked receptors Correct Answers Metabotropic
receptors __________.
,axoaxonic synapse Correct Answers axon terminals of the
neurons link -> special cuz they modulate the communication at
axodendritic and axosomatic synapses
axoaxonic synapses Correct Answers function as "modulatory
synapses" -> regulate the communication across another synapse
in these, NT from the presynaptic neuron doesn't generate
electrical signals in the postsynaptic neuron
instead, the NT bind to the postsynaptic's terminal membrane
and induces a change in the amount of Ca that enters the
terminal in response to an action potential
this alters the amount of NT released
axodendritic Correct Answers The vast majority of synapses in
the CNS are __________.
axodendritic synapse Correct Answers presynaptic axon to
postsynaptic dendrite
most common !!!!!
axodendritric, axosomatic Correct Answers excitatory and
inhibitory synapses occurs primarily at ______ and ______
synapses
axon terminal Correct Answers the ________ of the
presynaptic neuron releases NTs into the synaptic cleft
, NTs then rapidly diffuse across the cleft and bind to
postsynaptic receptors, producing a response in the postsynaptic
neuron by signal transduction mechanisms
axon terminal's cytosol Correct Answers NTs are synthesized
in the ______________, where synthesis enzymes are
then NTs are actively transported into the vesicles, where they're
stored until their release by exocytosis
axosomatic synapse Correct Answers axon to soma
bidirectional Correct Answers often communication in
electrical synapses is ______, and can be excitatory or inhibitory
at the same synapse
biogenic amines
decrease in these -> depression Correct Answers The two
main biochemicals believed to be associated with depression are
both __________. A third chemical associated with depression
is of the same biochemical type; this chemical is dopamine.
BZ; BZ-1 Correct Answers __________ receptors are targeted
to treat anxiety; __________ receptors are targeted in sleep aids.
calcium, action potentials Correct Answers the amount of NT
released depends on the concentration of _____ in the terminal
cytosol, which depends on the frequency of _____
