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If a cell has alpha adrenergic receptors is it sensitive to norepinephrine?
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∙ 10y ago
If a cell has α-adrenergic receptors, it is sensitive to
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∙ 10y ago
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What are the properties of the alpha adrenergic receptors?
The alpha adrenergic receptors are located in the effector organs of sympathetic nervous system. They are the most common type of alpha adrenergic receptor. Alpha adrenergic receptors tend to be excitatory. They have a greater affinity for nonepinephrine than epinephrine.
Where are alpha 1 receptors located?
peripheral blood vesels
What is the neurotransmitter of the motor neuron?
Alpha-Motor neurons release the neurotransmitter acetylcholine at a synapse called the neuromuscular junction. When the acetylcholine binds to acetylcholine receptors on the muscle fiber, an action potential is propagated along the muscle fiber in both directions.
Is escherichia coli optochin sensitive?
Optochin is a test used only for determining if an isolate of alpha-hemolytic streptococcus is Streptococcus pneumoniae. In the clinical laboratory, it is not used for testing of gram negative rods such as E. coli.
What is the effect of curare on eliciting an action potential?
it is an alpha-toxin that binds to acetylcholine binding sites on the postsynaptic cell membrane, which prevents the acetylcholine from acting. Curare blocks synaptic transmission by preventing neural impulses to flow from neuron to neuron. It does allow the action potential to travel in the axon, it just doesn't pass it on to the dendrite.
What are the properties of the alpha adrenergic receptors?
The alpha adrenergic receptors are located in the effector organs of sympathetic nervous system. They are the most common type of alpha adrenergic receptor. Alpha adrenergic receptors tend to be excitatory. They have a greater affinity for nonepinephrine than epinephrine.
Neurotransmittor for the sympathetic nervous system?
The neurotransmitter for sympathetic nervous system is norepinephrine (or also called noradrenaline) that acts on adrenergic receptors of the effector organ (alpha 1, beta 1, beta 2 receptors). The adrenergic receptors are G-protein coupled.
Stimulation of alpha-adrenergic receptors results in?
constriction of the blood vessels
How do alpha and beta receptors differ?
Affinity for different agonists, their locations throughout the body, the effects produced from their activation and supression. Presuming your talking about adrenergic receptorsAlpha adrenergic receptors & beta adrenergic receptors produce vasoconstriction and vasodilation respectively.
What are the 4 types of adrenergic receptors?
alpha 1, alpha 2, beta 1, beta 2
What are alpha receptor antagonists?
If they are also known as alpha-adrenergic blocking drugs (i'm not sure if they are), then they prevent norepinephrine from producing sympathetic responses.
What is coreg?
Coreg is one of the various trade names of Carvedilol as a generic drug in the U.S. fro the company GlaxoSmithKline. Carvedilol is a non-selective beta blocker/alpha-1 blocker indicated in the treatment of mild to moderate congestive heart failure (CHF). Carvedilol is a beta blocker and an alpha blocker:* Norepinephrine stimulates the nerves that control the muscles of the heart by binding to the β1- and β2-adrenergic receptors. Carvedilol blocks the binding to those receptors, which both slows the heart rhythm and reduces the force of the heart's pumping. This lowers blood pressure and reduces heart failure. * Norepinephrine also binds to the α1-adrenergic receptors on blood vessels, causing them to constrict and raise blood pressure. Carvedilol blocks this binding to the α1-adrenergic receptors too, which also lowers blood pressure.
What is an alpha-blocker?
An alpha-blocker is a drug which blocks a1-adrenergic receptors in arteries and smooth muscles, and is used to treat benign prostatic hyperplasia and prostatitis.
Why is epinpherine a vasoconstrictor and bronchodilator?
coz it works on alpha 1 adrenergic receptors in small blood vessels causing vasoconstriction and hence increase blood pressure (contrary to its action on skeletal muscles) it is also working on B2 adrenergic receptors causing bronchodilation
What is the difference between an alpha blocker and an alpha-adrenergic blocker?
There is no difference :)
What neurotranmitters are released by smpathetic and parasympthetic neurons?
The 2 divisions of the autonomic nervous system (sympathetic and parasympathetic) both have 2 areas where neurotransmitter is released. ?They have ganglionic synapses in the periphery wherein neurotransmitter is released and have synapses on the target organs wherein neurotransmitter is released. ?So this means there is preganglionic and postganglionic release of neurotransmitter.Sympathetic preganglionic neurotransmitter is Acetylcholine. ?Acetylcholine affects muscarinic receptors here.Sympathetic postganglionic neurotransmitter is Norepinephrine. ?Norepinephrine affects alpha or beta receptors here. ?Parasympathetic preganglionic neurotransmitter is Acetylcholine. ? Acetylcholine affects muscarinic receptors here.Parasympathetic postganglionic neurotransmitter is Acetylcholine. ?In this case Acetylcholine affects muscarinic receptors.?Sympathetic neurons are considered to be adrenergic & sympathetic neurons are considered to be cholinergic.
Are Alpha-adrenergic effects usually stimulatory and mediatory?
yes, true
