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89 Cards in this Set
- Front
- Back
SYM neurons have a ___ postganglionic neuron, whereas PARA neurons have a ___ one.
|
long NEergic (except sweat)
short cholinergic |
|
Sweat glands are exceptional in that they are innervated by ___, but have ___ic synapse.
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SYM
muscarinic |
|
ANS effect on SA node
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SYM: tachycardia
PARA: bradycardia |
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ANS effect on atria
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SYM: + inotropic
PARA: - inotropic |
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ANS effect on AV node
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SYM: increased conduction
PARA: decreased conduction |
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ANS effect on ventricles
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SYM: + inotropy
PARA: none |
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ANS effect on arterioles
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SYM: vasoconstriction
PARA: none, but muscarinic AChR present |
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ANS effect on venules
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SYM: venoconstriction
PARA: none |
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ANS effect on bronchiolar smooth muscle
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SYM: bronchodilation
PARA: bronchoconstriction |
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ANS effect on bronchiolar secretion
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SYM: inhibited
PARA: stimulated |
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ANS effect on intestinal muscle
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SYM: relaxation
PARA: contraction |
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ANS effect on GIT sphincters
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SYM: contraction
PARA: relaxation |
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ANS effect on GIT glands
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SYM: none
PARA: secretion |
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ANS effect on detrusor
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SYM: relaxation
PARA: contraction |
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ANS effect on bladder sphincter
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SYM: contraction
PARA: relaxation |
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ANS effect on vas deferens
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SYM: contraction, ejaculation
PARA: none |
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ANS effect on penis
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SYM: flaccidity
PARA: erection |
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ANS effect on pupillary sphincter
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SYM: mydriasis
PARA: miosis |
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ANS effect on ciliary muscle
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SYM: relaxation
PARA: contraction->accomodation |
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ANS effect on skin
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SYM: vasoconstriction, sweating
PARA: none |
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Skeletal nicotinic receptors are agonized by ___ and antagonized by ___.
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nicotine
curare |
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GIT smooth muscle has ___ic, ___ic, and ___ic synapses.
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muscarinic
adrenergic (NE) serotonergic |
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GIT mucosa has __ic and __ic synapses
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muscarinic
adrenergic (NE) |
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Parasympathetic nicotinic receptors are agonized by ___ and antagonized by ___.
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nicotine
hexamethonium |
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Parasympathetic muscarinic receptors are agonized by ___ and antagonized by ___.
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muscarine
atropine |
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Sympathetic nicotinic receptors are agonized by ___ and antagonized by ___.
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nicotine
hexamethonium |
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T/F: Hexamethonium is not a good antihypertensive.
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True (acts on both SYM & PARA)
|
|
neuropeptide Y action
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vasoconstriction
|
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vasoactive intestinal peptide (VIP) action
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vasodilation
|
|
P1 receptor action
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vasodilation
|
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P1R is agonized by ___ and antagonized by ___
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adenosine
methylxanthines (caffeine) |
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P2R is agonized by ___
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ATP, ADP
|
|
Y is converted to ___ by ___.
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DOPA
Y hydroxylase |
|
DOPA is converted to ___ by ___.
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DA
DOPA decarboxylase (AAADC) |
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DA is imported to vesicles by ___.
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VMAT (vesicular monoamine transporter)
|
|
DA is converted to ___ by ___.
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NE
DBH (DA beta hydroxylase) |
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In ___, NE is converted to ___ by ___, in the ___.
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adrenal medulla
E PNMT (phenylethanolamine N-methyl transferase) cytoplasm |
|
VMAT is blocked by ___.
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reserpine
|
|
MAO action
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replaes alpha amino group with hydroxy or carboxy
|
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COMT action
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replaces 3-hydroxy with methoxy
|
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After MAO-COMT in either order, DA becomes ___
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HVA (homovanillic acid)
|
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After MAO-COMT in either order, E becomes ___ and NE becomes ___
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both become MHPG
|
|
After COMT, E becomes ___ and NE becomes ___.
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metanephrine
normetanephrine |
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adrenal pheochromocytomas make more ___ than ___, but other ones do the opposite
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E
NE |
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markers for pheochromocytoma
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urinary free catecholamines
VMA metanephrines |
|
MAO-A is inhibited by ___
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clorgyline
phenelzine tranylcypromine |
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MAO-B is inhibited by ___
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deprenyl
rasagiline phenelzine tranylcypromine |
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MAO-A substrates are (4)
|
NE
serotonin DA tyramine |
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MAO-B substrates are
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phenylethylamine
benzylamine |
|
___ has mostly alpha effects at therapeutic doses, but ___ has ___ effects at low doses and ___ effects at high doses.
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NE
E beta alpha |
|
Isoproteronol has much greater affinity for ___ than ___. Therefore it causes ___.
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beta
alpha + inotropism, + chronotropism, vasodilation |
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isoproteronol action
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beta1, 2 agonist
|
|
prazosin action
|
alpha 1 antagonist
|
|
phentolamine action
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alpha 1, 2 antagonist
|
|
E after phentolamine demonstrates ___
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E reversal: only beta effect
|
|
beta receptor is agonized nonselectively by ___ and antagonized nonselectively by ___
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isoproteronol
propranolol |
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phenylephrine action
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selective alpha 1 agonist
|
|
clonidine action
|
selective alpha 2 agonist
|
|
beta 1 has greater affinity for ___, whereas beta 2 has greater affinity for ___. ___ agonizes both equally
|
NE
albuterol E |
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in addition to cardiac effects, beta 1 agonists cause release of ___
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renin
|
|
yohimbine action
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alpha 2 antagonist
|
|
alpha 1 acts via
|
Gq -> PLC, PLA, Ca channels
|
|
alpha 2 acts via
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Gi -> adenylate cyclase
Go -> calcium channels |
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beta acts via
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Gs -> adenylate cyclase
|
|
E is used for
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cardiac arrest
anaphylaxis hemostasis |
|
NE is used for
|
little (some patients with shock + vasodilation)
|
|
dobutamine action
|
selective beta 1 agonist
|
|
dobutamine is used for
|
heart failure
|
|
DA is used for
|
shock
|
|
albuterol action
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selective beta 2 agonist
|
|
albuterol is used for (2)
|
bronchodilation for asthma
delaying premature delivery |
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clonidine is used for
|
antihypertension
|
|
naphthazoline, oxymetazoline action
|
alpha 1, 2 agonists
|
|
naphthazoline, oxymetazoline used for
|
nasal decongestion
|
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nonselective beta agonists (2)
|
E
isoproteronol |
|
nonselective beta antagonist
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propranolol
|
|
beta1 agonists (2)
|
dobutamine
NE |
|
beta1 antagonist
|
atenolol
|
|
beta2 agonist
|
albuterol
|
|
beta3 agonists (2)
|
BRL-37344
NE |
|
nonselective alpha agonists (2)
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E
NE |
|
nonselective alpha antagonists (3)
|
phentolamine
phenoxybenzamine ergot alkaloids |
|
alpha1 agonist
|
phenylephrine
|
|
alpha1 antagonist
|
prazosin
|
|
alpha2 agonist
|
clonidine
|
|
alpha2 antagonist
|
yohimbine
|
|
use E for (3)
|
anaphylactic shock
cardiac arrest hemostasis |
|
use DA for
|
cardiovascular shock
|
|
use dobutamine for
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acute HF
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