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49 Cards in this Set

  • Front
  • Back
The PNS pre and post synaptic neurons that release ACh
Cholinergic Neuron
PNS neuron located on the post-synaptic membrane of the pre-synaptic neuron
Nicotinic Cholinergic Neuron
PNS neuron located on the post-synaptic membrane (target tissue) of the post-synaptic neuron
Muscarinic Cholinergic Neuron
SNS post-synaptic neuron that releases NE. Pre-synaptic receptor controls release of NE whereas the axon terminal reuptake protein controls removal of NE
Adrenergic Neuron
Chemical structures of dopamine, norepinephrine and epinephrine
Catacholamines
2 major enzymes that metabolize, break down or inactivate catacholamines
MAO and COMT
PNS responses
Miosis, bradycardia, bronchiocontriction, constriction of gall bladder and urinary bladder, increase GI motility and GI secretions
SNS responses
Mydrasis, bronchiodilation, increase cardiac outout, vasoconstriction of renal and mesenteric blood vessels, relaxation of skeletal muscle, relaxation of bladder, decrease GI motility
Adrenergic Receptors
Alpha 1- F/F response
Alpha 2- located on the pre-synaptic membrane of the post-synaptic neuron
Beta 1- F/F response for Cardiac
Beta 2- Passive response
Adrenergic receptors on SNS response
Mydrasis- Alpha 1
Increase cardio output- Beta 1
bronchiodilation- Beta 2
Decrease GI motility- Beta 2
vasoconstriction of renal- Alpha 1
vasodilation of skeletal muscle- Beta 2
relaxation of the bladder- Beta 2
Direct Acting cholinomimetics
bethanechol, pilocarpine, nicotine and varenicline
Bethanechol
MA-Muscarinic cholinergic receptor agonist.
TE-Used in the treatment of GI and bladder paralysis.
PT- induce systemic PNS effects
Pilocarpine
MA-Muscarinic cholinergic receptor agonist.
TE- used for the treatment of glaucoma
Nicotine
MA- nicotinic cholinergic receptor agonist
TE- used for the treatment of smoking withdrawl symptoms
varenicline
MA- nicotinic cholinergic partial agonist
TE- helps decrease cravings and pleasure effects of cigarettes
Indirect Acting Cholinomimetics
Neostigmine and Tacrine
Neostigmine
MA- acetylcholinesterase inhibitor. ACh accumulates in synapse and produces effect.
TE- used for the treatment of GI and bladder paralysis, gluacoma and mysternia gravis
Tacrine
MA-passes through BBB. ACh enzyme inhibitor. Reverses short term memory by increasing ACh
TE- treatment of symptoms of Alzheimer's disease
Cholinolytics
cholinergic receptor blockers, Suppresses PNS functions.
Atropine and Scopolamine
Atropine
MA- muscarinic cholinergic receptor antagonist.
TE- induces mydrasis, reduces secretions, treatment of bradycardia, treatment of severe diarrhea and bladder incontinence
Scopolamine
MA- muscarinic cholinergic receptor antagonist
TE-used in the treatment of motion sickness. inhibits the cholinergic activation of the emesis center
Ganglioinic blockers
blocks SNS responses.

Trimethaphan
Trimethaphan
MA- nicotinic cholinergic receptor antagonist. (decreases release of NE)
TE- treatment of severe hypertension
Skeletal muscle relaxants/anti-spastic drugs
baclofen and d-tubocurare
baclofen
MA- a GABA receptor agonist that suppresses motor neuron activity and nerve conduction
TE- inhibits activity of motor neurons associated with exaggerated reflex activity such as MS
d-tubocurare
MA- nicotinic cholinergic receptor antagonist on skeletal muscle ( blocks excitation-contraction coupling)
TE- induce skeletal muscle relaxation needed during surgery. For tracheal intubations or shock therapy
Adrenergics
alters the biosynthesis of catacholamines.
methyltrosine and L-DOPA
Methyltrosine
MA- inhibits tyrosine hydroxylase
TE-treatment of pheochromocytoma; a tumor of the adrenal medulla, assoc with excessive production of catacholamines and development of severe hypertension
L-DOPA
MA- serves as a substrate for dopamine synthesis
TE- pass through the BBB and elevates dopamine synthesis and reduce tremors and other motor disorders, parkinsonism
Generalized sympathomimetics
not selective for any sub-type of adrenergic receptor.
epinephrine and dopamine
Epinephrine
MA-a Alpha 1 and 2, Beta 1 and 2 adrenergic receptor agonist wich induces F/F responses
TE- induces SNS effects- bronchiodilation, treatment of cardiac arrest
Dopamine
MA-is an agonist for D-1, beta 1 and Alpah 1 adrenergic receptors
TE- cardiogenic shock by acting as a renal D-1 receptor, increases RBF. Beta 1 increases cardiac output
Alpha adrenergic receptor sympathomimetics
phenylephrine, tetrahydralazine and clonidine
Phenylephrine
MA-Alpha 1 adrenergic agonist
TE- nasal decongestant by inducing vasoconstiction of bllod vessels in nasal mucosa
Tetrahydralazine
MA- Alpha 1 adrenergic agonist.
TE- used to treat irritation of eyes induced by allergens, smoke or fatigue by inducing vasoconstriction of blood vessels on the surface of the cornea
Clonidine
MA- passes through the BBB and acts as an Alpha 2 AR agonist, reduces the release of catacholimines and SNS tone
TE- used as an antihypertensive drug.
Beta Adrenergic receptor sympathomimetics
mimics NE responses
isoproternal, doputamine and albuterol
Isoproternal
MA-generalized Beta 1 and 2 AR agonist
TE-cardiac stimulant
doputamine
MA- selective beta 1 AR agonist
TE-cardiac stimulant
albuterol
MA- selective Beta 2 AR agonist
TE-used as a bronchiodilator
Indirect acting and mixed acting sympathomimetics
amphetamines and ephedrine
Amphetamines
MA-transported into sympathic axon terminal where it displaces catacholimes from internal stores.
TE- CNS stimulant. Treats narcolepsy. Used in children for ADD
Ephedrine
MA- displaces NE from internal stores (slow displacement) and is also an Alpha 1 & Beta 2 AR agonist.
TE- nasal decongestant and bronchiodilator
Alpha AR sympatholytics
Alpha AR blockers
phentolamine and prazosin
Phentolamine
MA-generalized Alpha 1 & 2 AR antagonist
TE-treatment of frost bite and Raynaud's syndrome. Reduces cutaneous vasoconstriction and increases blood flow to the skin
Prazosin
MA-selective Alpha 1 AR antagonist
TE-antihypertensive drug. Redcues peripheral vasoconstriction to renal and mescentric vascular beds
Beta AR sympatholytics
Beta AR blockers
propranolol and metaprolol
Propanolol
MA-generalized Beta 1 & 2 antagonist
TE-prophylactic treatment of migraine headaches that are assoc with vasoconstriction (beta 2 mediated)
Metaprolol
MA- selective Beta 1 antagonist
TE-hypertension, cardiac arrhythmias and ishemic heart disease