CBRS EXAM 2026 EXAMINATION TEST
COMPLETE QUESTIONS AND 100%
CORRECT ANSWERS UPDATED VERIFIED
GRADED A+
⩥ multi-cell level of communication. Answer: utilize synapses, are the
neural bases of the actions of psychoactive drugs, disorders, and
cognitive functions
⩥ types of synapses. Answer: chemical and electrical
⩥ use neurotransmitters and account for most synapses in mature
nervous systems. Answer: chemical synapses
release neurotransmitters from the presynaptic to activate postsynaptic
⩥ utilize passive current and is bidirectional. Answer: electrical synapses
more common in early development of nervous systems
⩥ electrical synapses use _____ ____. Why?. Answer: gap junctions
,this allows for fast signal transmission since no neurotransmitters are
needed; the membranes of the pre and postsynaptic cells are connected
through the channels
⩥ gap junctions are made of these. Answer: connexons
⩥ connexons are made of these. Answer: connexins
⩥ how many connexons (and connexins) per gap junction. Answer: 2
connexons (on pre and on post) so 12 connexins for one gap junction
⩥ are gap junctions selective?. Answer: nope, they have a large pore and
allow numerous ions and molecules to pass through
⩥ a change in membrane potential of the postsynaptic neuron due to the
activation of a synapse. Answer: electrical postsynaptic potential (PSP)
⩥ Would one electrical synapse be sufficient to trigger an action
potential in the postsynaptic neuron?. Answer: nope, one channel only
causes a small change in membrane potential so we want a lot of
channels to allow for depolarization to accumulate and cause a sufficient
change
,⩥ what do gap junctions allow for in terms of synapse activity. Answer:
synchronize the activity/firing of the action potential/depolarization of
the pre and post-synaptic
⩥ gap junctions are vital for.... Answer: synchronizing activities
⩥ when neurons are connected by electrical synapses they are said to be
..... Answer: electrically coupled
⩥ T/F: PSPs are only for electrical synapses. Answer: false, chemical
synapses can do this too
⩥ Question: Which of the following is NOT the characteristic of
electrical synapses?
a) Ability to generate postsynaptic potentials (PSPs) b) Bidirectionality
c) High speed
d) Ability to synchronize neuronal activities
e) The most common form of synapses in the brain. Answer: e, they are
common in development but chemical is the most common in the brain
normally/when mature
⩥ what happens when you stimulate the vagus nerve. Answer: it slows
down the heartbeat
, ⩥ what is released from the vagus nerve?. Answer: vagus substance aka
acetylcholine
⩥ the site of the neurotransmitter release and activation of the
postsynaptic receptors. Answer: the active zone (chemical synapses)
⩥ activation of postsynaptic receptors is a form of __ signaling. Answer:
intracellular signaling
⩥ what are the forms of synaptic arrangement (x5). Answer:
axodendritic, axosomatic, axoaxonic, axospinous, and dendrodendritic
⩥ what is the most common synaptic arrangement. Answer: axodendritic
⩥ what are the two types of synapses based on membrane
differentiations. Answer: Grays type I (asymmetrical) and grays type II
(symmetrical)
⩥ this synapse type is common for excitatory function and has a thicker
post-synaptic side with circular vesicles. Answer: Gray's type I
(asymmetrical)
⩥ this type of synapse is common in inhibitory paths and has thin
membranes on the pre and post synaptic cells with oval vesicles.
Answer: Gray's type II (symmetrical)
COMPLETE QUESTIONS AND 100%
CORRECT ANSWERS UPDATED VERIFIED
GRADED A+
⩥ multi-cell level of communication. Answer: utilize synapses, are the
neural bases of the actions of psychoactive drugs, disorders, and
cognitive functions
⩥ types of synapses. Answer: chemical and electrical
⩥ use neurotransmitters and account for most synapses in mature
nervous systems. Answer: chemical synapses
release neurotransmitters from the presynaptic to activate postsynaptic
⩥ utilize passive current and is bidirectional. Answer: electrical synapses
more common in early development of nervous systems
⩥ electrical synapses use _____ ____. Why?. Answer: gap junctions
,this allows for fast signal transmission since no neurotransmitters are
needed; the membranes of the pre and postsynaptic cells are connected
through the channels
⩥ gap junctions are made of these. Answer: connexons
⩥ connexons are made of these. Answer: connexins
⩥ how many connexons (and connexins) per gap junction. Answer: 2
connexons (on pre and on post) so 12 connexins for one gap junction
⩥ are gap junctions selective?. Answer: nope, they have a large pore and
allow numerous ions and molecules to pass through
⩥ a change in membrane potential of the postsynaptic neuron due to the
activation of a synapse. Answer: electrical postsynaptic potential (PSP)
⩥ Would one electrical synapse be sufficient to trigger an action
potential in the postsynaptic neuron?. Answer: nope, one channel only
causes a small change in membrane potential so we want a lot of
channels to allow for depolarization to accumulate and cause a sufficient
change
,⩥ what do gap junctions allow for in terms of synapse activity. Answer:
synchronize the activity/firing of the action potential/depolarization of
the pre and post-synaptic
⩥ gap junctions are vital for.... Answer: synchronizing activities
⩥ when neurons are connected by electrical synapses they are said to be
..... Answer: electrically coupled
⩥ T/F: PSPs are only for electrical synapses. Answer: false, chemical
synapses can do this too
⩥ Question: Which of the following is NOT the characteristic of
electrical synapses?
a) Ability to generate postsynaptic potentials (PSPs) b) Bidirectionality
c) High speed
d) Ability to synchronize neuronal activities
e) The most common form of synapses in the brain. Answer: e, they are
common in development but chemical is the most common in the brain
normally/when mature
⩥ what happens when you stimulate the vagus nerve. Answer: it slows
down the heartbeat
, ⩥ what is released from the vagus nerve?. Answer: vagus substance aka
acetylcholine
⩥ the site of the neurotransmitter release and activation of the
postsynaptic receptors. Answer: the active zone (chemical synapses)
⩥ activation of postsynaptic receptors is a form of __ signaling. Answer:
intracellular signaling
⩥ what are the forms of synaptic arrangement (x5). Answer:
axodendritic, axosomatic, axoaxonic, axospinous, and dendrodendritic
⩥ what is the most common synaptic arrangement. Answer: axodendritic
⩥ what are the two types of synapses based on membrane
differentiations. Answer: Grays type I (asymmetrical) and grays type II
(symmetrical)
⩥ this synapse type is common for excitatory function and has a thicker
post-synaptic side with circular vesicles. Answer: Gray's type I
(asymmetrical)
⩥ this type of synapse is common in inhibitory paths and has thin
membranes on the pre and post synaptic cells with oval vesicles.
Answer: Gray's type II (symmetrical)
