Exam 4 Quizzes with verified
solutions 2024
What statement is CORRECT about the β3 receptor?
It couples to the Gq family of G proteins increasing calcium
It activates adenylate cyclase, producing an increase of cAMP levels
It is coupled to the Gs family of G proteins
1 and 2
2 and 3 - answer 2 and 3
The __________presynaptic receptors decrease the release of
Norepinephrine.
Beta 2
Alpha 2
Beta 1
Alpha 1 - answer Alpha 2
Which statement is CORRECT concerning the postganglionic neurons
in the adrenergic system?
They are long neurons
They release NE and E
They are short neurons
1 and 2
2 and 3 - answer 1 and 2
What adrenergic receptor is the main receptor present in the heart?
Beta 1 receptor
,Alpha 1 receptor
Beta 2 receptor
Alpha 2 receptor - answer Beta 1 receptor
Which adrenergic receptor is an excitatory receptor?
β2R
β1R
α1R
All of the above
None of the above - answer All of the above
Postganglionic neurons that innervate the thorax synapse with
preganglionic neurons at a collateral ganglion.
True
False - answer False
In the adrenergic system, acetylcholine is released by__________.
Preganglionic neuron
Postganglionic neuron
Both Pre and Postganglionic neurons
None of the above - answer Preganglionic neuron
Acetylcholine can produces an increase of the release of NE.
True
False - answer True
__________ is the predominant receptor in the heart.
Alpha 1
, Alpha 2
Beta 1
Beta 2 - answer Beta 1
Epinephrine decreases intracellular cAMP levels by acting
on____________.
α1 receptor
α2 receptor
beta1 receptor
beta2 receptor - answer α2 receptor
Release of epinephrine from chromaffin cells in the adrenal medulla
is produce following the release of ACh from postganglionic neuron
synapsing with the cells.
True
False - answer false
You develop a drug that activates alpha-2 presynaptic receptor. This
drug will___________.
Increase the release of NE at the synapse
Decrease the release of NE at the synapse
Not change NE levels at the synapse
None of the above - answer Decrease the release of NE at the
synapse
NE increases blood pressure by producing vasoconstriction. What
statement is CORRECT concerning the effect of reserpine in the
vascular system?
Reserpine blocks alpha-1 receptors in blood vessels decreasing
blood pressure
Reserpine decreases the storage of NE depleting NE at the synapse
solutions 2024
What statement is CORRECT about the β3 receptor?
It couples to the Gq family of G proteins increasing calcium
It activates adenylate cyclase, producing an increase of cAMP levels
It is coupled to the Gs family of G proteins
1 and 2
2 and 3 - answer 2 and 3
The __________presynaptic receptors decrease the release of
Norepinephrine.
Beta 2
Alpha 2
Beta 1
Alpha 1 - answer Alpha 2
Which statement is CORRECT concerning the postganglionic neurons
in the adrenergic system?
They are long neurons
They release NE and E
They are short neurons
1 and 2
2 and 3 - answer 1 and 2
What adrenergic receptor is the main receptor present in the heart?
Beta 1 receptor
,Alpha 1 receptor
Beta 2 receptor
Alpha 2 receptor - answer Beta 1 receptor
Which adrenergic receptor is an excitatory receptor?
β2R
β1R
α1R
All of the above
None of the above - answer All of the above
Postganglionic neurons that innervate the thorax synapse with
preganglionic neurons at a collateral ganglion.
True
False - answer False
In the adrenergic system, acetylcholine is released by__________.
Preganglionic neuron
Postganglionic neuron
Both Pre and Postganglionic neurons
None of the above - answer Preganglionic neuron
Acetylcholine can produces an increase of the release of NE.
True
False - answer True
__________ is the predominant receptor in the heart.
Alpha 1
, Alpha 2
Beta 1
Beta 2 - answer Beta 1
Epinephrine decreases intracellular cAMP levels by acting
on____________.
α1 receptor
α2 receptor
beta1 receptor
beta2 receptor - answer α2 receptor
Release of epinephrine from chromaffin cells in the adrenal medulla
is produce following the release of ACh from postganglionic neuron
synapsing with the cells.
True
False - answer false
You develop a drug that activates alpha-2 presynaptic receptor. This
drug will___________.
Increase the release of NE at the synapse
Decrease the release of NE at the synapse
Not change NE levels at the synapse
None of the above - answer Decrease the release of NE at the
synapse
NE increases blood pressure by producing vasoconstriction. What
statement is CORRECT concerning the effect of reserpine in the
vascular system?
Reserpine blocks alpha-1 receptors in blood vessels decreasing
blood pressure
Reserpine decreases the storage of NE depleting NE at the synapse
